Purpose: it is suitable to all kinds spring soft mattress.

垫耐久性测试仪用途：本机适用于各种弹簧软床垫测试。

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Objective to prepare a novel soft mattress and to study its application in prevention of pressure sores in patients.

目的探讨实用新型软垫的制作及在预防压疮中的应用。

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Finally, I heard himdemand that a wooden board be placed under his mattress, which he foundtoo soft to appease a spine clearly en route to osteoporosis.

最后，我听见他让别人在他的床垫下放一块木板，因为光有床垫的话，对他的脊椎来说就会太软，导致他骨质疏松。

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In general, for most painful conditions, experts say choosing a mattress that isn't too firm or soft is ideal.

WSJ: Find the Perfect Sleep Position