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
specific resistance of soil
speed-change gear
speed gear
change spur gear
change gear
change gear wheel
change speed gear
speed change gear
change-speed gear
transmission gear
speed range gear
change gear change wheel
change wheel
variable gear
variable-speed gear