Its subject coverage includes: role of hydrogen, factors affecting embrittlement after heat treatment, and preventive measures.
它的主题涉及的范围包括：氢的作用、热处理后影响脆化的因素、预防措施。
Its subject coverage includes: role of hydrogen, factors affecting embrittlement after heat treatment, and preventive measures.
它的主题涉及的范围包括：氢的作用、热处理后影响脆化的因素、预防措施。
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