检验填函盖的钳紧扭矩是否符合标准规格。
Check if the clamp-sealing torque of packing gland accords with the standard specification.
液压油管钳扭矩控制阀用于油管和抽油杆上螺纹时控制其扭矩值 ，以免扭矩过大而损坏螺纹或造成本体变形。
The torque control valve of hydraulic tong is developed to protect the scrws of tube and suck rod from being damaged or deformed caused by over tightness.
应用推荐