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Produce specifications for 400mm. It used round steel, flat steel, steel pipes, steel and non-ferrous materials put punctuation mark, for use by the tension test specimen. The Agency made precise, easy to use, high efficiency, some accurate and easy inspection and repair.

Technical requirements for each shake once to break 40 points. Distance of 10MM of punctuation, error not exceeding ± 0.15mm, full length 400mm punctuation tips, made with ball bearing steel, hardness no less than of RC55.