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
计算，大横杆在横杆的
面。
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计算，大横杆在横杆的面。
声
：
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