空转
idle; idling; racing; spin
running open
running free; running idle
空转的
dallying
idle
空转的机器
idle-machine
空转功率
idle capacity
空转换
null transition
空转接收机
dallying receiver
空转轮
idle gear
空转期间
idle period
空转时间
idle running time
空转试验
run-in test
空转速度
load-free speed
空转调整
idling adjustment
空转字符
idle character
净化空气总管
clean air manifold
净空
headroom
clear space
净空高度
head room; head-room clearance; overhead clearance
净空间
clear space
静止空气粘滞性
viscosity of stationary air
绝对空间
absolute space
绝对真空
absolute vacuum