tightness
特殊用法air tightness1.■气密性defective tightness1.■不够紧密gas tightness1.■气密性; 不透气性lattice tightness1.■晶格密度leak tightness1.■密封性, 密闭度manpower tightness1.■劳动力不足oil tightness1.■不透油(性)vacuum tightness1.■真空密闭tightness of case1.■表壳密封性tightness of money1.■资金不足; 金融市场紧张