测速测距
Speed and distance measurement
微波测速测距
relative velocity and distance survey by microwave
篦齿盘均压孔
aperture of labyrinth disc
变速齿轮
transmission gear
speed-change gear
speed change gear
variable-speed gear
change gear change wheel
change spur gear
change gear wheel
speed gear
change wheel
change gear
change-speed gear
variable gear
speed range gear
change speed gear
specific resistance of soil