工作副切削刃

working face

soil working agriculture, forestry

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

scratching fine working of stones, crystals, semiconductor materials by scratching

attaching closure devices in the working of paper

working barrel【油气】

compression moulding around inserts,working of plastics

working pit edge【矿】;working slope【矿】