用弹簧加载的
Loaded by spring
以上为机器翻译结果，长、整句建议使用 人工翻译 。
用特定的加载块反复对床垫进行冲击，评估其耐用性，和弹簧的坚牢保持度。
Test objectives: use specific block impact on the mattress over and over again, to assess their impact, and the durability of solid retentivity.
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应用推荐
模块上移
模块下移
不移动