7 D3 N7 j) o& J" s% z& K; j/ w: D& s, e& V9 p6 X% k& Y0 ?% T
a dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot4 O! k/ p7 ^' A' b
exerting a total force of 0.83 ±0.03 N (3.0 ±0.1 ozf) on a rectangular anvil measuring : a4 C3 h* O) Q" g# iapproximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be 7 e/ Z! R; C6 }. Wslightly convex. Alternatively, these measurements shall be made with a dead-weight dial; U+ m# M _( l4 ~( j# @) l
micrometer having a presser foot 6.4 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total( r& `9 B! w. v& P" Q- J, m5 ^
of 85 ±3 gf or 0.83 ±0.03 N (3.0 ±0.1 ozf) on the specimen – the load being applied by means 2 L* M8 b. J& \of a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for $ y8 ]3 z4 _& z# c6 G1 W; Zeach measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in); & n7 q4 Y- V- f+ Zf) a micrometer with a resolution and accuracy of 0.001 mm (0.0001 in); ( P# q' h& C& V* Y% ?5 p+ V: s- x$ \就是UL用來測量啞鈴片厚度的, * e" ^1 {7 g& ^" ?' n9 g/ T4 F作者: lengchuan000 时间: 2013-12-19 16:46
CHENGFEGO 发表于 2013-12-19 16:02 : I) {, m6 Y# f
a dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot 0 {! [% ]( p* A# q' P* jexertin ...