双向筒形活塞式空气弹簧的英文

reversible sleeve piston type pneumatic spring

• 双向:    two-way
• 筒:    a section of thick ...
• 形:    form; shape
• 活塞:    plunger; stop; bib ...
• 式:    type; style
• 空气弹簧:    air spring; pneuma ...