瓦斯管弯头的安设不仅消耗了大量材料，而且增加了抽放阻力。
The installation of gas pipe elbows not only consumes a great deal of materials, but also increases the drainage resistance.
瓦斯管弯头的安设不仅消耗了大量材料，而且增加了抽放阻力。
The installation of gas pipe elbows not only consumes a great deal of materials, but also increases the drainage resistance.
应用推荐