工作接地

writing pen ；manufacture by non-cutting metal working

sterile working

making countersinks, counterbores by means of electrochemical metal working

working temperature

superfinish working by means of superfinish working

real-time working ratio【计】

socially necessary labo(u)r time【劳经】;socially necessary working time【劳经】;

working fluid non-positive displacement machine or engine