pack life meaning in English
纺丝头组合件使用周期
Examples
- 13 cr hardened stem with mirror - like , burnished finish for longer packing life
13 cr硬化的阀杆，接近镜面的抛光度，延长填料的使用寿命。 - Packing : packing contains corrosion inhibitor to avoid stem pitting . stuffing box is deep , assuring long packing life
填料：填料内含防腐剂，避免锈蚀阀杆。深度填料函确保较长的填料使用寿命。