Assuming you haven't the space or means to rig up your very own water fountain and courtyard at home, we are left with considering an air-conditioning unit.
假如你家里没有足够的空间,或无力拼凑一个属于自己的喷泉和庭院,那我们就只能考虑空调了。
It's very important for some petroleum machinery(e. g. drilling rig and pumping unit) to carry on reliability analysis and design of the system of the narrow V type belt drive.
开展窄V带传动系统可靠性分析与设计对于提高钻机、抽油机等石油钻采机械的质量和效益具有重要意义。
Importance is narrated that already existed the well head mechanical unit in rig, only if when Provided well head mechanical unit, obtains on safety, time saving, working saving.
叙述了改进已有钻机井口机械化装置的重要性,指出钻机上只有通过配套井口机械化装置,才能在安全、省时、省工等方面取得突破。
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