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本帖最后由 CHENGFEGO 于 2013-12-19 16:09 编辑 4 @% x7 @* H1 Y% S" f5 W5 U! k0 N
lengchuan000 发表于 2013-12-19 15:48
- C- W' Q" N. M4 C9 O% S请教一下UL什么要求 / G( f# k3 e/ I& f j5 C
# p- C. K, e; M1 k" s: ha dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot
- D2 z5 i7 X( L# M; d4 ~8 Jexerting a total force of 0.83 ±0.03 N (3.0 ±0.1 ozf) on a rectangular anvil measuring' Y% ?( j( ]# M; H& p3 V8 }
approximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be+ q) ]5 F/ P4 d( l& u+ h% A
slightly convex. Alternatively, these measurements shall be made with a dead-weight dial
- g3 R3 Y( V$ q) |- E2 Kmicrometer having a presser foot 6.4 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total
2 |- J( T% c1 }( G8 xof 85 ±3 gf or 0.83 ±0.03 N (3.0 ±0.1 ozf) on the specimen – the load being applied by means: B1 B! `7 W8 {& w; W8 } R
of a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for
6 D# q' ?; e2 x$ Heach measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in);0 P% Y0 d! {1 ?& {1 Y7 p
f) a micrometer with a resolution and accuracy of 0.001 mm (0.0001 in);
6 H+ L8 ^: W" _3 ?0 |; ?就是UL用來測量啞鈴片厚度的,
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