... area of safe operation 安全工作区 area of section 横断面积 area of section 横剖面面积 ...
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core area of section 截面核芯面积
area of cross section 横断面面积
section area of drainage water 排水截面积
Section area of Cable 电缆截面积
area of wetted cross-section 过水横断面积
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