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Q420D irin awo
Q420D irin awo
Q420D irin awo
Q420D irin awo

Q420D irin awo

GB / T1591 Q420 ni marun ti o yatọ irin onipò bi Q420A,Q420B,Q420C,Q420D ati Q420E.Structural irin Q420D will be done impacting test at low temperature minus 20 degree centigrade.Normalised ooru itọju daba lati ṣee ṣe fun kekere alloy irin awo awo. Q420D ni eru sisanra.
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