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June 2026 တွင်ပါဝင်ခဲ့သည်

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$Rubber Squeeze Bulb: Latex Coagulated Inside a Split Mould Coated with Calcium Nitrate (Szegvari, Anode, US 1,949,502)$

Mars Makerspace

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ဘလူးပရင့်စာကြည့်တိုက်

Metal Oxide Varistor: Zinc Oxide with 1 % Bismuth Oxide, 1100 °C, 1.0 mm (Masuyama 1972)

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 0.03 % Manganese Dioxide, 1350 °C (Masuyama 1972, Ex. 2)

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 0.05 % Manganese Dioxide, 1350 °C (Masuyama 1972, Ex. 2)

Longquan Celadon Bowls: Glaze of Glaze Stone, Husk-and-Lime Ash and Zijin Clay, Reduction Fired

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 0.2 % Manganese Dioxide, 1350 °C (Masuyama 1972, Ex. 2)

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 12 % Manganese Dioxide, 1350 °C (Masuyama 1972, Ex. 2)

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 0.5 % Ferric Oxide, 1350 °C (Masuyama 1972, Ex. 2)

Metal Oxide Varistor: Zinc Oxide, 0.5 % Bismuth Oxide, 0.5 % Boric Oxide, 1350 °C (Masuyama 1972, Ex. 2)

PTFE Rod: a Plug Sintered in Boiling Retene Vapour (Brubaker & Hanford 1946)

Antimony Trioxide: Roasted Antimony Fused with More Metal (Thorpe 1912)

Lead Subacetate Solution: Lead Acetate Boiled with Litharge, USP 1860

Zirconium Hydroxide: Zircon Fused with Potassium Bisulphate, then Caustic Soda in Silver (Roscoe 1913)

Zirconium Nitrate: Zirconium Hydroxide Dissolved in Nitric Acid and Evaporated (Roscoe 1913)

Craft Knife: Doniger's Hinged Handle and Reversible Blade

Zirconium: Oxide Reduced with Calcium and Calcium Chloride in a Sealed Bomb at 950 °C (Kiernan, US 1,760,413)

Metal Oxide Varistor: Pure Zinc Oxide at 800 °C, Bismuth Oxide Paste Fired at 800 °C (Masuyama 1972, Ex. 4)

Metal Oxide Varistor: Pure Zinc Oxide at 1000 °C, Bismuth Oxide Paste Fired at 800 °C (Masuyama 1972, Ex. 4)

Metal Oxide Varistor: Pure Zinc Oxide at 1150 °C, Bismuth Oxide Paste Fired at 800 °C (Masuyama 1972, Ex. 4)

Metal Oxide Varistor: Pure Zinc Oxide at 1400 °C, Bismuth Oxide Paste Fired at 800 °C (Masuyama 1972, Ex. 4)

Variable Contrast Paper: One Emulsion in Five Parts Dyed 30, 15, 6, 2 and 0 mg per Litre (Schwarz, Bell & Howell, US 2,620,272)

Oxygen from Green Leaves under Water in Sunshine (Ingenhousz 1779)

Glass Cutter: Monce's Hardened Steel Wheel

Metal Oxide Varistor: Pure Zinc Oxide at 1350 °C, Bismuth Oxide Paste Fired at 1000 °C (Masuyama 1972, Ex. 4)

Wind Speed by Eye on the Beaufort Scale (1925 Table)

Metal Oxide Varistor: Pure Zinc Oxide at 1350 °C, Bismuth Oxide Paste Fired at 1200 °C (Masuyama 1972, Ex. 4)

Gasoline by Pressure Cracking: Heavy Residue Distilled at 650-850 °F under 4-5 Atmospheres (Burton, US 1,049,667)

Extruded Polystyrene Foam: Propylene-Blown Log Let Out at 60 °C (McIntire, Dow 1948, Ex. 3, Test 3)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Tin Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Antimony Trioxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Barium Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.2 % Bismuth Oxide, 1150 °C, 1.0 mm (Masuyama 1972)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Nickel Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Titanium Dioxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Diphenyl Ether: Chlorobenzene and Phenol in Caustic Soda at 400 °C (Dow 1978)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Boric Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Aluminium Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with 0.5 % Ferric Oxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Octamethylcyclotetrasiloxane (D4): Silane Hydrolysate Cracked with Potash in Diphenyl Ether (Asahi 1980)

Ammonia Solution of Specific Gravity 0.910: Strong Ammonia Diluted to 24.99 % by Hydrometer (Lunge and Wiernik table, Thorpe 1912)

Metal Oxide Varistor: Zinc Oxide with 2.5 % Manganese Dioxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Metal Oxide Varistor: Zinc Oxide with Bismuth, Manganese and Antimony Oxides, 1350 °C (Masuyama 1972, Ex. 3)

Metal Oxide Varistor: Zinc Oxide with Manganese and Boric Oxides, Bismuth Paste Fired On (Masuyama 1972, Ex. 6)

Metal Oxide Varistor: Zinc Oxide with Manganese and Barium Oxides, Bismuth Paste Fired On (Masuyama 1972, Ex. 6)

Rubber Thread: One Long Strand Cut Spirally from Cured Sheet (Gibbons 1934)

Metal Oxide Varistor: Zinc Oxide with Manganese and Antimony Oxides, Bismuth Paste Fired On (Masuyama 1972, Ex. 6)

Metal Oxide Varistor: Zinc Oxide with Manganese and Titanium Oxides, Bismuth Paste Fired On (Masuyama 1972, Ex. 6)

Screw Eye: Parmelee's One-Piece Wire Eye with a Stop-Ring

Metal Oxide Varistor: Zinc Oxide with 0.5 % Chromic Oxide, Bismuth-Manganese Oxide Paste Fired On (Masuyama 1972, Ex. 7)

Metal Oxide Varistor: Pure Zinc Oxide, Bismuth-Manganese Oxide Paste Fired On (Masuyama 1972, Ex. 7)

Neodymium Magnets, Sample 2: 83Fe-2B-15Nd Sintered (Sagawa 1988)

Metal Oxide Varistor: Zinc Oxide with 0.2 % Manganese Dioxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)

Neodymium Magnets, Sample 9: 73Fe-12B-15Nd Sintered (Sagawa 1988)

Neodymium Magnets, Sample 10: 68Fe-17B-15Nd Sintered (Sagawa 1988)

Neodymium Magnets, Sample 11: 62Fe-23B-15Nd Sintered (Sagawa 1988)

Carbon Steel Strip: Saw Plate Sheared and Annealed Soft

Neodymium Magnets, Sample 14: 70Fe-17B-13Nd Sintered (Sagawa 1988)

Neodymium Magnets, Sample 16: 53Fe-17B-30Nd Sintered (Sagawa 1988)

Neodymium Magnets, Sample 23: 67Fe-8B-25Nd Sintered (Sagawa 1988)

Ferrite Toroid Core: Copper-Zinc Ferrite by the Wet Process, Precipitated with Caustic Soda (Snoek 1948)

Ferrite Toroid Core: Wet-Process Copper-Zinc Ferrite with a Stepped Anneal Down to 310 °C (Snoek 1948)

Silver Oxide: Silver Nitrate Precipitated with Solution of Potassa (USP 1870)

Fired Silver Paint: Silver Oxide Paint with Silver Nitrate Added Just Before Use (Gray, Erie Resistor 1954, Ex. 5)

Barium Ferrite Disc Magnet from Natural Magnetite, Ground Half an Hour Only (Went, Philips 1956, Ex. 36, Procedure 3)

Elastic Cord: Cotton Braided over a Stretched Rubber Strand (Blakesley 1889)

Ferrite Toroid Core: Copper-Zinc Ferrite Sintered at 1250 °C, Presintered Three Times at 900 °C (Snoek 1948, Ex. I)

Precipitated Silica: Hot Water Glass Carbonated, Then Acidified to pH 6.75 (Allen 1957)

Kerosene: Burning Oil Distillate Acid-Treated, Washed and Steam-Stilled to Fire Test (Sadtler, in Thorpe 1913)

Oriented Barium Ferrite Disc Magnet: Powder Ground 48 Hours (Gorter, Philips 1956, Ex. 7)

Activated Alumina: Aluminium Trihydrate Heated at 350 °C While Hot Air Carries the Steam Away (Derr, Alcoa, US 2,015,593)

Making Blister Steel by Cementation — Carburizing Wrought Iron into Steel

Moto, the Sake Starter: Steamed Rice, Koji and Water Fermented Cold for Fourteen Days (Itami, after Rein 1889)

Sake from Moto: the Mash Built Up in Three Additions, Soye, Naka and Shimai, Pressed and Settled (Itami, after Rein 1889)

Ferric Chloride Hexahydrate: 1,000 Parts of 10 % Solution Evaporated to 483 (Ph. G. 1882)

Neodymium Magnets, Sample 25: 78Fe-10B-12Nd Sintered (Sagawa 1988)

Plastic Syringe Set: Moulded Barrel and a Soft Polyethylene Piston

Acetoacetanilide: Aniline in Ether with Diketene Added Slowly (Gleason, Standard Oil Development, US 2,174,239)

Sew-In Interfacing: Cotton Shrunk Overnight Before Cutting