What is the difference between a conventional standard products back?

by:OUHE     2020-07-06
With seating SJ - at the airport M1 and SJ - 900 900 m8: chair plate punching hole shape is different, different plate thickness ( SJ - Thickness of 1 900 m1. 5900 M8 thickness of 1. 8) Article, edge thickness ( SJ - Article 900 m1 edge thickness is 1. Article 3900 M8 edge thickness is 1. 5) , chair board same size, welding forming chair plate after finished the same size.
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