片语
Double width spur wheel加宽直齿轮
spur-wheel reversing gear正齿轮回动装置
spur wheel countershaft正齿轮副轴
spur gear wheel正齿轮
spur wheel gear正齿轮
spur geared wheel reductor外啮合圆柱齿轮式轮边减速器
spur friction wheel筒形摩擦轮
spur gears[机] 正齿轮;直齿圆柱齿轮(spur gear的复数)
transmission spur wheel传动正齿轮