... 螺栓(或高强度螺栓有效直径)：effective diameter of bolt or high-strength bolt 螺帽扳手：nut runner 螺口灯头：screw socket ...
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若在接头处漏水，则可用扳手拧紧螺帽，漏水严重的必须重新拆装。
If the joint leaks, then tighten the nut wrench can be used, must be serious leakage disassembly.
如果扳手(扳钳)的钳夹出现变形、磨损或裂纹，则不宜再使用。它们可能会在您始料未及之时导致螺栓或螺帽滑脱。
Wrenches (spanners) must not be used if its jaws are sprung, worn or cracked. They may slip off a bolt or nut when you least expect it.
使用钳子或管扳手拧紧螺栓或螺帽。这样可能会刮伤螺栓头或螺帽，从而形成尖锐的边缘。
Using pliers or a pipe wrench to tighten a bolt or nut. This may scar the bolt head or nut creating a sharp edge.
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