油管螺纹 meaning in Chinese

tubing thread

Api tubing thread
美国石油学会油管螺纹
Verification regulation of master gage for rotary shouldered connections thread , casing round thread and tubing thread
石油钻具接头螺纹套管圆螺纹和油管螺纹校对量规检定规程
Calibration specification for working gauge of rotary shouldered connections , round thread casing and tubing
石油钻具接头螺纹工作量规圆螺纹套管工作量规和油管螺纹工作量规校准规范