超长环形结构
overlong annular concrete structure
环形形变光栅
toroidally-deformed grating
矩形环形复合感应器
inductor of rectangle-cycle multiplex structure
循环球齿条齿扇式转向器
recirculating ball-rack and sector steering gear
循环球-柱塞齿条齿扇式
recirculating-ball-plug rack and sector gear style
产形齿条
Imaginary generating rack
counterpart rack
imaginary rack