The extrusion device thereof is the combined device of the spring and the air bag, and has uniform extrusion force as well as safe and reliable use.
它的挤压装置为弹簧与气袋的组合装置，挤压力均匀，使用安全可靠。
The extrusion device thereof is the combined device of the spring and the air bag, and has uniform extrusion force as well as safe and reliable use.
它的挤压装置为弹簧与气袋的组合装置，挤压力均匀，使用安全可靠。
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