两面磨光夹丝玻璃 saferite
两段磨轮 two-stage wheel
钻磨两用机床 drilling and grinding machine
两面磨光法 twin-plate process
车磨两用床 grinding lathe
平磨两面 Grinding on both sides ; Two-top grinding ; Both sides flat grinding
两端闭合并磨平 Ends closed and ground flat
两面磨光嵌网玻璃 saferite
两肩磨损 Shoulder Wear-Both Sides
两体磨损 two body wear
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