... 拱冠梁 crown cantilever 拱副梁 拱形梁 archedbeam 拱副梁, 拱形梁, 拱形辕杆 arched beam ...
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crown cantilever method 拱冠粱法
crown cantilever adjustment 拱冠悬臂梁校正
crown cantilever tapping 拱冠梁
arch crown cantilever method 拱冠梁法
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The framework of the long-stroke pumping unit with compound crown sheave consists of a flat frame with four columns, two cantilever beams and two back legs.
复合天轮式长冲程抽油机主架由四柱扁框架、两个悬臂梁和两个后支腿组成。
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