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This is one of Bare copper wire 0.07mm spec.

Test Report
Product Name:  Bare Copper Wire 0.07mm
NO	Item		unit	Standards	Test
1	Test quantity		m	10	10
2	Material		-	Bare Copper Wire	Bare Copper Wire
3	Diameter of  Wire		mm	0.07±0.003	0.070-0.072
4	Variation		-	annealed	annealed
5	Electroplating(Yes  No)		-	No	No
6	Strsnds		-	/	/
7	Elongation		%	=15	18.2-20.3
8	Conductor Resistance		Omm2/m at 20?	=0.017241	0.017152
9	Twisting Direction		S or Z	/	/
10	Stranding Pitch		mm	/	/
11	Appearance		-	Normal	Normal
Remark : All is OK