The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
横杆按照简支梁进行强
和挠

,大横杆在
横杆的上
。
The strength and deflection of putlog as easy supporting girder, and the ledger is over and supported by putlog.
横杆按照简支梁进行强
和挠

,大横杆在
横杆的上
。

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