What is the difference between getting a back?

by:OUHE     2020-05-26
Getting regular standard back width is how many? How much is the thickness of seat back? For example: SJ909 series: the standard width of 550 mm ( The allowed tolerance & plusmn; 3 mm) , the thickness of the seat back real thickness of 2. 0mm。 SJ9061 series: the standard width of 525 mm ( The allowed tolerance & plusmn; 5毫米) , backplane for polyurethane polymer ( English abbreviation PU) , 座背 built-in hob or iron. SJ9063 series: the standard width of 520 mm ( The allowed tolerance & plusmn; 3毫米) , backplane for polyurethane polymer ( English abbreviation PU) , 座背 built-in iron plate. Runs through the back of the comparison chart:
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