Materials for main parts 主要零件材料 ; 外螺纹截止阀 ; 外螺旋角式截止阀 ; 压力针型阀
Materials for main par 外螺纹角式针型阀
main materials for building 建筑主体材料
Materials s for main parts 主要零件材料
When they do forage for food and for shelter materials, they have to leave their homes and go up on land where their main predators are.
当它们寻找食物和遮蔽物的时候，它们不得不离开家，到主要捕食者所在的陆地上去。
If, by contrast, everything was in a pile on the main floor, it would significantly reduce the usefulness of the library by making the search for materials virtually impossible.
如果采用相反的方式，将所有的东西都堆在一个大房间里，由于几乎不能进行资料搜索，因此会大幅度降低图书馆的有用性。
As well as lithium-iron phosphate, other innovative materials have been used for the three main battery components of anode, cathode and electrolyte.
与锂-铁磷酸盐一样，其他新型材料已经用到了电池的三个主要部件，阳极、阴极和电解液。
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