发明申请
US20110260028A1 Chassis, Base, And Negator Spring 有权
底盘,底座和阴极弹簧

Chassis, Base, And Negator Spring
摘要:
A base, a chassis and a negator spring. The negator spring has a first cross sectional area and a second cross sectional area. The negator spring can oppose a force on the chassis.
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