With gasketed connections, the material of construction of the washer is important, both for compatibility with the gases in use and for its mechanical properties.
对于衬垫接头，垫圈的结构材料对于使用的气体的相容性和垫圈的机械性能都是很重要的。
Wood is very important strategic resources of national economy in China, and it is the basic production material of construction, building materials, furniture industry and many related industrial.
木材是我国国民经济中十分重要的战略资源，也是建筑、建材、家具工业及许多相关工业的基本生产资料。
Wood is very important strategic resources of national economy in China, and it is the basic production material of construction, building materials, furniture industry and many related industrial.
木材是我国国民经济中十分重要的战略资源，也是建筑、建材、家具工业及许多相关工业的基本生产资料。
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