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Watch Jewel Bearing Set (ruby)
Synthetic corundum hole jewels and flat cap jewels as used in watch trains. The hole is olived — belled out — so contact is a narrow band that runs freer and retains oil by surface tension.
Bei haipatikani kwa eneo hili
Bidhaa marejeleo - Inatumika katika ramani na maudhui ya elimu
Inapakia michoro...