1.
Don't race the engine.
不要让发动机空转。
2.
Don't race your engine, ie make it run fast when not in gear.
不要让发动机空转.
3.
reverse idler gear shaft bearing
回动空转齿轮轴轴承
4.
drive idler gear
空转传动齿轮，怠速齿轮
5.
air delivered anti-pollution transfer system
防油污空投转移系统
6.
atmospheric displacement
空气置换转化为蒸汽
7.
mark-to-space transition
传号－空号脉冲转换
8.
and the air was full of them in a twinkling.
转眼间，空中满是土块。
9.
rotary air engine
旋转式热空气发动机
10.
drag cup induction motor
空心转子感应电动机
11.
air stabilization
空气稳定系统(回转时
12.
rotating viscometer vacuum gauge
旋转粘度计式真空计
13.
rotary starting air distributor
回转式起动空气分配阀
14.
two-stage rotary air compressor
二级旋转式空气压缩机
15.
radiosonde commutator
无线电探空仪转换开关
16.
drum film dryer
转鼓式真空过滤干燥器
17.
rotation of fetal head by vacuum extractor
真空吸引器旋转胎头术
18.
disk type rotary vacuum filter
圆盘式旋转真空过滤器