valve plug的用法和样例：
例句
- The additional benefit of lifting the plug is the low friction and low torque required to cycle the valve.
提升阀塞的其他优点是循环操作阀门所要求的低摩擦和低扭矩。 - The facing is deposited on the plug and body seats and is then machined to a mirror-like surface.
阀塞和阀体阀座表面先由沉积层形成，然后经过机加工制成镜面光洁度表面。
