compressed spring length 压缩弹簧长

effective spring length 有效弹簧长

precompressed spring length 弹簧预压缩量

recoil spring length 反冲弹簧长度

spring length measurement 弹簧检长

zero-length spring 零长弹簧 ; 零长式弹簧

zero-initial-length spring [地物] 零长弹簧

Set Spring Rest Length 设置弹簧静止长度

zero-length spring gravimeter 零长度弹簧式重力仪 ; [地物] 零长弹簧重力仪