英德
有道
百度
谷歌
图片
维基
百科
正传动 [zhèng zhuàn dòng]
positive drive
- 纸机安装;精度;基准线划定;辊子找正;传动安装;
Keywords reference line drawing;sole plate installation;alignment of roll;drive installation;cleaning installation;foundation subsidence; - 分析了石油钻机中使钻井泵正转的必要性；对实现正转的各传动方案进行了对比分析；简述了各种传动方案的优缺点。
Abstract The necessity of the shush pump with forward rotating of drilling rig is analyzed,advantages and disadvantages of various transmission plan were compared and described. - JZF系列混凝土搅拌机系自落式双锥反转出料搅拌机，搅拌筒由齿圈传动，工作时正转搅拌、反转出料，可搅拌塑性和半干硬性混凝土。
JZF350 concrete mixeris a kind of self-fall double-prick reversal discharging machine;the drum is driven by the gear ring;
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中国词汇量第二的英语词典
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