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本帖最后由 CHENGFEGO 于 2013-12-19 16:09 编辑
4 d7 d m- p- M5 O$ x. r5 vlengchuan000 发表于 2013-12-19 15:48
8 [: z# q; [1 K. m0 h& D+ w请教一下UL什么要求
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/ s! M5 e/ v1 n/ k% e1 F! ~a dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot& C: q. l/ V* Z6 q/ o/ M
exerting a total force of 0.83 ±0.03 N (3.0 ±0.1 ozf) on a rectangular anvil measuring/ @1 e* E/ _. I% J2 m
approximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be4 Q1 r3 C- p) J
slightly convex. Alternatively, these measurements shall be made with a dead-weight dial7 J( U8 O/ d, _9 b0 y7 \* [2 ?
micrometer having a presser foot 6.4 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total
6 h" I+ r6 I" Uof 85 ±3 gf or 0.83 ±0.03 N (3.0 ±0.1 ozf) on the specimen – the load being applied by means
+ M5 b5 f# ]+ G/ j, wof a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for
* C8 t$ m0 m0 U) t! ?" a/ l& o: Teach measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in);" I$ t7 e9 D- m
f) a micrometer with a resolution and accuracy of 0.001 mm (0.0001 in);2 w- U! T7 X8 W
就是UL用來測量啞鈴片厚度的,
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