题目内容
根据JG135规定，当最低层站的装载高度()该层地板水平面时，需要在井道的底部提供一个符合规定要求的底坑。
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按JG135规定，动力电路和电气安全装置电路对地绝缘电阻不小于()。控制照明信号电路对地绝缘电阻不小于a。
A tug is best positioned for towing and maneuvering on rivers and other restricted waters
Should the Buyers of the vessel cause undue delay they shall ______ for the losses thereby
A type of precipitation that occurs only in thunderstorms with strong convection currents
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