American aluminium alloy leveling ruler

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American aluminium alloy leveling ruler
Posting date : Dec 07, 2009
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72-
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American aluminium alloy leveling ruler made according to standard JB/T7977-99, material HT250, working surface made by skiving for precise rubbing ,Used to test the straightness and flatness of workpiece and equipment installing working environment temperature(20±5) Type(mm) Straightness and flatness of working surface Parallelism between working surface Precision grade(μm) 0 1 2 0 1 2 500*35 3 6 12 4.5 9 18 750*40 4 8 15 6 12 25 1000*50 5 10 20 7.5 15 30 1250*50 12 24 18 36 1600*70 15 30 20 40 2000*80 18 36 27 54 2500*80 44 65 3000*100 52 78 3500*100 60 90 4000*100 68 100 You can visit our website http://cnzbzg.en.alibaba.com to get more details about our comapany and products.

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