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Carbon thiab carbon-manganese steel seamless steel raj thiab kav rau nkoj GB / T5312
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Seamless steel raj rau lub hom phiaj GB / T8162
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Cold-draw los yog txias-dov precision seamless steel tubesGB / T3639
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Seamless steel raj rau kev kub siab rau tshuaj chiv equipementsGB/T6479
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Seamless steel raj thiab kav rau kev kub siab boilerGB / T5310
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Seamless steel raj rau qis thiab nruab nrab siab boilerGB / T5310
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Seamless steel raj rau kua serviceGB / T8163
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Seamless steel raj rau roj av crackingGB / T9948