提升装置的天轮、卷筒、主导轮和导向轮的最小直径与钢丝绳直径之比,悬挂吊盘、吊泵、管道用绞车的卷筒和天轮,凿井时运料用绞车的卷筒不小于
A
暂无解析
支持代孕的理由有
Weareallconcerned_______hersafety.
Theoutlineofrooftopsandchimneys________againstthepalesky.
句子写作：TodayatschoolMrMoorebroughtinhispetrabbit.Heshowedittotheclass.
Theboycomplained_______apaininhisstomach.
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