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See Chinese contents: GB/T 14345-2008 GB/T 14345-2008: Testing method for twist of man-made filament
This Standard specifies the testing method for twist of man-made fibre filaments such as polyester, polyamide (chinlon), polypropylene, cellulose fibre. This Standard applies to the determination of the twist of man-made fibre filaments with twist. The man-made fibre filament drawn from the fabric can refer to it for use. This Standard does not apply to filaments with an elongation greater than 0.5% when the tension increases from 0.05 cN/dtex to 0.1 cN/dtex.
