The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
小横杆按照简支梁进行
挠计算，大横杆在小横杆
上面。
复数形式）The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
小横杆按照简支梁进行挠计算，大横杆在小横杆上面。
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