Taper pipe threads 锥管螺纹
Drill pipe threads 石油钻杆螺纹
Gauges for taper pipe threads 锥形管螺纹量规
Parallel internal pipe threads 直管螺纹
taps for pipe threads 管螺纹用丝锥
asa pipe threads 美国标准协会管螺纹
Parallel pipe threads 圆柱管螺纹
JIS Taper pipe threads 日标锥管螺纹
taps for taper pipe threads 锥管螺纹丝锥中径
The axial flotation of chuck plays an important role in the protection of rod pipe threads and prevention of rod pipe stripping or cutterhead from dropping during the process of raise boring.
在天井钻进过程中，卡盘的轴向浮动对保护钻杆螺纹和防止钻杆脱扣、刀头坠落等方面具有重要作用。
Drill pipe threads are not cleaned in that way.
钻杆丝扣不是那样清洗的。
Apply pipe dope sparingly on pipe threads, never on valve threads.
在管道螺纹上涂敷螺纹油，但是不要在阀门螺纹上涂螺纹油。
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