trouble-free service meaning in English

安全工作
可靠服务
无故障使用

Where stress and intragranular corrosion are a problem , a forging will assure long life and trouble - free service
在应力和晶体内腐蚀问题严重的地方，锻件都能够保证较长的使用寿命和无故障服务。
Disc stem nut : disc stem ring connects the disc to the stem , permitting the disc to swivel and aid in securing tight seating for trouble - free service
阀瓣阀杆螺母：阀瓣阀杆环将阀瓣连接到阀杆上，使得阀瓣能够旋转，并有助于保证阀座地紧密密封和无故障运行。
Seat rings : seat rings are seal welded to eliminate leak path behind rings and for long trouble - free service . the surfaces are precision ground to fit accurately with the disc
阀座环：阀座环境过密封焊接，可消除环后的泄漏通道，延长无故障工作的寿命。表面经过精密研磨以精确配置阀瓣。