For edge joining, the mating surfaces must be flat and square to both faces of the board.
对于边的连接，对接面必须平整、方正(和相邻两面垂直)。
Pneumatic squaring head can square the sawtooth edge produced by disc heads, with smooth and flat edges.
其中气动修边能有效地消除碟形磨边所产生的锯齿状边，使砖坯周边光滑平整。
Pneumatic squaring head can square the sawtooth edge produced by disc heads, with smooth and flat edges.
其中气动修边能有效地消除碟形磨边所产生的锯齿状边，使砖坯周边光滑平整。
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