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Otai is a leading China supplier of 4140 Plate, 440C, M2 HSS, working with Bohler, Uddeholm, Thyssenkrupp, with ISO9001 certified.
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Otai is a leading China supplier of 4140 Plate, 440C, M2 HSS, working with Bohler, Uddeholm, Thyssenkrupp, with ISO9001 certified.
