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U41HU41YӲܷYyܷ⸱ɾĥ̎ڶѺӲyMּӹքeMНB̼lB W̎Ӳȿɸ_HRC58—64y_ܷȦ͟oǽٲ͉ĥԝĹܷɿ
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YLȣ GB/T 12221 ASME B16.10
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в庸Bӣ JB/T 1751 ASME B16.11
ݼyBӣ GB7036 ASME B1.20.1
ԇcz GB/T 13927 API 598
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