The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically.
对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。
The expansion joint comprises a corrugated pipe, the cross section of which is rectangular.
本实用新型 包括波纹管，所述的波纹管的横截面为矩形。
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