词汇	水泥止回阀
释义	水泥止回阀 cement valve
随便看	double reinforced steel double reinforcement double reinforcement beam double reinforecment double relation measure double relay mechanism double-relay mechanism double remainder algorithm double remelting Double renal pelvis double renewal process double rent double rent and double value double rent payer double renvoi double repeated double repeated experiment double replacement double-replacement double replacement reaction double-replacement reaction double replacement reactions double-replacement reactions double replica double replicon