negative thread

• 阴螺纹

negative thread的用法和样例：

例句

1. Before make-up of threaded joints, threads shall be brushed, cleaned and teflon paste thread sealant or suitable alternate applied to the male portion.
   在准备螺纹接口时，应仔细用钢丝刷将螺纹清理干净，然后将阴螺纹涂上特氟龙胶泥螺纹密封剂或其它合适的替代品。