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