half built up crank shaft [= semi-built-up crank shaft
Hold Up And Stop Up Rotating
sequence of train breaking up and making up
up-supply and up-discharge
up-supply and up-exhaust
a bamboo or wicker scoop
air scoop
控制棒驱动
进气口
空气口
[招]风斗
风斗
自然通风吸入口
backward-tilted scoop failure pattern