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![A7 TEST BLOCK](https://images.findtheneedle.co.uk/findtheneedle/products/5367123.jpg)
A7 Test Block Checking shear wave probe resolution as BS4331 part 3, 1974. Steps of 2,3,4 and 5mm. Standard made to- BS 2704 Carbon Steel 74mm radius 75mm thick.
For more information on A7 TEST BLOCK talk to Oceanscan Ltd
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