Assembled by sewing, gumming or otherwise (other than pieces goods consisting  of two or more lenghts of identical material joined end to end and pieces goods composed of two more textile assembled in layers whether or not padded) or:

can someone translate it pls

 This is not particularly good English for someone to translate.  Is it from instructions for a product made in a Chinese factory?  At a guess I would say it is something that has been translated from one language into English.

The sentance in the bracket does not make much sense.