• It is manufactured a follow sealant to neuter pen with synthetic oil and white carbon black, this sealant possesses good follow performance, and can satisfy the sealing requirement of neuter pen.

    合成碳黑制备了一种中性密封剂密封剂有良好随动性能满足中性笔密封要求

    youdao

  • It is manufactured a follow sealant to neuter pen with synthetic oil and white carbon black, this sealant possesses good follow performance, and can satisfy the sealing requirement of neuter pen.

    合成碳黑制备了一种中性密封剂密封剂有良好随动性能满足中性笔密封要求

    youdao

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