1、凸面滑轮
... crown post ==> 桁架中柱 crown pulley ==> 凸面滑轮 crown radius ==> 碟形半径,圆球半径 ...
2、天轮
...crown pillar 阶段间矿柱crown pulley 天轮crozzling coal 炼焦煤 ...
3、天车
... crown profile 钻头冠的外形 crown pulley 天车 crown safety platform 天车安全台 ...
4、隆面皮带轮
... 顶板 crown plate 隆面皮带轮 crown pulley 冠状锯 crown saw ...