含碳稍高
It has a slightly high carbon content
以上为机器翻译结果，长、整句建议使用 人工翻译 。
结果表明，导致密封圈变形而破裂的原因是选用的ST12钢含碳量太低，应选用含碳量和强度稍高的材料来制造。
The result shows the reason why sealing washer parts destroyed is that carbon content of ST12 steel used is too low. High carbon content and strength material should be used to produce the parts.
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