求翻译：3.2落煤管有标准落煤管和非标准落煤管。标准落煤管口径尺寸为1400mm×1400mm和1000mm×1000mm两种。非标准落煤管安装于3、4、5号转运站和碎煤机室内，所有非标准落煤管（包括方圆管、圆管直径400mm）口径尺寸由投标方根据设计院提供的图纸确定。是什么意思？

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3.2 the standard Drop Down coal coal and non-standard Drop coal. Drop the caliber and standard size 1400 mm x 1400 MM and 1000 mm x 1000 mm . Non-standard falls and installed in 3, 4, 5 pieces of coal transfer station and the room, all non-standard Drop coal tube radius (including tube, round tube d

3.2 coal dropping pipe standard coal dropping pipe and non-standard coal dropping pipe. Standard coal dropping pipe diameter size for both 1400mmx1400mm and 1000mmx1000mm. Non-standard coal dropping pipe install on 3, 4, and 5th station and coal crushers indoor, all non-standard coal dropping pipe (