Rig floor work area must be clean and escape routes (doors, stairs, etc.) are accessible at all times and are not obstructed by hoses, tools etc.是什么意思_Rig floor work area must be clean and escape routes (doors, stairs, etc.) are accessible at all times and are not obstructed by hoses, tools etc.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句