... 环形材：buttwood 环纹刻石刀：thread burr 环首螺丝：eye screw ...
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After ensuring the male coupling nut is free of scratches, nicks and burr, take the nut and insert into the cable with the thread pointing outward.
按螺纹朝外方向将公螺母装入电线。装入前螺母应被检查过没有刮伤，毛刺。
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