The manufacture technical parameters and processing technique of hollow sucker rod specified for gravity heat pipe shell are put forward , and the special sucker rod is manufactured , and the type is FTG .
提出了重力热管壳体专用空心抽油杆的制造技术参数和加工工艺技术；成功生产了定型产品抽油杆，产品型号为FTG。
ftg