强制移动起动机小齿轮
positive shift starter pinion
起动电动机小齿轮
starter motor pinion
starter motor pinion gear
starting motor pinion gear
starting motor pinion
起动电动机小齿轮间隔
starting motor pinion clearance
滚子齿轮凸轮机构
Roller-gear Cam Mechanism
主汽轮机齿轮机组
main steam turbine gear unit
小齿轮轮齿啮合
pinion gear tooth contact
小齿轮轮齿啮合型式
pinion tooth contact pattern