在粉末泵中的收缩能够使压缩空气从喂料系统到喷粉枪提升和搬运粉末。
A constriction in a powder pump that USES compressed air to lift and transport powder from feed system to the spray gun.
在金属结构上局部加热，使结构的某些部位被塑性压缩，冷却以后由残留的局部收缩而获得矫正。
Local heating on the structure of metal produces the plastic contract of some places of the structure. After cooling, the remained contract can repair the beams bend.
在金属结构上局部加热，使结构的某些部位被塑性压缩，冷却以后由残留的局部收缩而获得矫正。
Local heating on the structure of metal produces the plastic contract of some places of the structure. After cooling, the remained contract can repair the beams bend.
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