为了方便广大考生更好的复习，综合整理了雅思分类词汇：流体设备系列文章，愿大家都能取得好成绩。
2.2 螺纹
左螺纹left hand thread
右螺纹 right hand thread
管螺纹 pipe thread
锥管螺纹 taper pipe thread
直管螺纹straight pipe thread
梯形螺纹 trapezoid thread
螺距pitch of thread
粗牙螺纹coarse thread
细牙螺纹 fine thread
特细牙螺纹extra fine thread
通长螺纹full thread
惠氏螺纹whitworth thread
公制螺纹 metric ibread
美国标准锥管螺纹 American standard taper pipe thread
螺孔 tap
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