This is made from a part which is machined up on the lathe and tapped for screwing into the valve-plate, and a short section of steel tubing.
这是由一个是加工上的车床和到阀板拧挖掘的一部分，以及钢管短节。
The section of traditional portal rigid frame are constant cross-section and wedge shape variable cross-section, this paper brings up a component cross-section—ripple web plate variable cross-section.
传统的门式刚架的构件截面为等截面和楔形变截面，本论文提出了一种构件截面形式——波纹腹板变截面。
The section of traditional portal rigid frame are constant cross-section and wedge shape variable cross-section, this paper brings up a component cross-section—ripple web plate variable cross-section.
传统的门式刚架的构件截面为等截面和楔形变截面，本论文提出了一种构件截面形式——波纹腹板变截面。
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