NF S86-610-1996 钟表业.非铁合金制镀铬表壳的验证
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NF S86-610-1996 钟表业。非铁合金制镀铬表壳的验证
Horology. Verification of chromium plated watch cases made in non ferrous alloys.
Horology. Verification of chromium plated watch cases made in non ferrous alloys.
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