What is the difference between the seat of airport waiting chair
It is different of the seat board punching hole and plate thickness such as SJ-900M1 is the thickness of 1.5 ,SJ900M8 is the thickness of 1.8. It is different edge of thickness such as SJ-900M1 is edge thickness of 1.3,SJ900M8 edge thickness is 1.5, the seat is the same size and finished size after welding.
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