The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
按照简支梁进行强度和挠度计算，
在
面。
木；建筑支架木The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
按照简支梁进行强度和挠度计算，在面。
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