watertightadj.不漏水的；无懈可击的watertight material防水材料watertight clothing防水衣watertight door test水密门试验watertight diaphragm防渗心墙,防渗核壁watertight connector水密接头watertight rail rail挡水横条watertight structure水密结构watertight integrity水密封完整性watertight transducer水密探头, 防水探头watertight instrument水密式仪器仪表