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41 Dyne pen's video
NBCHAO
VIDEO
488 plays ·
· 2020-04-16
Fengzhiyue 41 Dyne test Pen is a blue Dyne pen, which is made up of 6.50% ethylene glycol ether and 13.5% formamide. The 41 Dyne test Pen can determine whether a certain Printing ink is used for Printing.
Brand:FengZhiYue
Model:41
Name:Dyne pen
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