正弦中心块规
55070-50 GB50P
高速钢块规
55080-32-0 GB32H0
陶瓷块规
55100-32-0 GB32D0
高速钢针规
55110-0510 GB0510E
钨钢针规
55120-0510 GB0510F
陶瓷针规
55130-0510 GB0510G
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