D-4103的液控阀编号?风开还是风关?管线材质,管径?
参考答案:
D-4103液控阀LV4302,是风开阀,管线材质0cr18Ni9Ti,管径50mm
D-4103的液控阀编号?风开还是风关?管线材质,管径?
参考答案:
D-4103液控阀LV4302,是风开阀,管线材质0cr18Ni9Ti,管径50mm
完型填空. | ||||
A generation gap has become a serious problem. I need a __1__ about it in the newspaper. Some | ||||
|