power-assisted brace gas spring

...     power-adjusted rear wheels 半自动轮距调整轮     power-assisted brace gas spring 助力撑杆     power-shift rear wheels 半自动轮距调整轮 ...

 e gas spring

... argon gas spring 氩气弹簧 e gas spring 助力撑杆 GAS SPRING SEAL 气压油封 ...