... Hydraulic valve液压阀 Chock line阻流管线 Well control manifold井控管汇Pressure relief valve压力释放阀Directional well定向井 ...
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Under the conditions of larger longitudinal and cross-fall of road line, the author describes the calculations about core slab and box beam bridge chock.
阐述了在路线纵、横坡较大条件下空心板及箱梁桥楔块的设置与计算。
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