42CrMo seamless steel yeeb nkab belongs rau ultra-siab lub zog steel, nrog lub zog siab thiab toughness, zoo hardenability, tsis pom tseeb tempering brittleness, siab qaug zog txwv thiab ntau yam cuam tshuam tsis kam tom qab quenching thiab tempering, thiab zoo low-temperature cuam tshuam toughnes ...
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