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1. Hardwood for impact test:
6 V! ]. A, ^1 J' }Its surface should consist of a layer of nominal 25 mm (1 inch) tongue-and-groove oak flooring (actual size 18 by 57 mm or 3/4 by 2-1/4 inch) mounted on two layers of nominal 19 mm (3/4 inch) plywood.! k# D, r, ?% A0 b
$ y) i, c% G& _7 T9 S, C% s3 M; q2. Electrodes for hi-pot test The electrodes, 6.4mm diameter for its cylindrical brass rods, with edges rounded to a 0.8mm radius
2 q0 t5 n! T3 t$ t9 G, y[url=]3. Mechanical strength test[/url] The steel hemisphere 12.7 mm (1/2 in) in diameter 如有童鞋知道哪里可以购买,欢迎告知,谢谢大家 . K8 C: T; j) S5 f7 f
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