| 摘要 |
PROBLEM TO BE SOLVED: To provide a wood spring system and a wood spring bed wherein spring legs can be set at most suitable positions by adjusting to a user, and which can be used as an ordinary bed as well when required. SOLUTION: The spring legs having different repulsive forces and different lengths are installed on a draining board for bed to enable the wood spring bed to be used under the most suitable state by adjusting them to the user in the wood spring system and the wood spring bed. COPYRIGHT: (C)2011,JPO&INPIT
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