扭转环环槽
keystone design ring groove
扭转环环槽量规
keystone piston ring groove gauge
转8AG、转8G型转向架
Zhuan8AG and Zhuan8G bogies
扭转环量规组
keystone piston ring groove gauge group
乙型转型生长因子
Transforming growth factor
Moser扭转定理
Moser twist theorem
Moser’s twist theorem
Moser’s small twist theorem