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.
用合成油和白碳黑制备了一种中性笔随动密封剂，该密封剂有良好的随动性能，能满足中性笔的密封要求。
Their blackboard is the whiteboard so that it can only be written by the whiteboard pen. …The blackboard is white board, can only use white…
他们的黑板是白色的白板，只能用白板笔在上面写字。（翻译一下）
Their blackboard is the whiteboard so that it can only be written by the whiteboard pen. …The blackboard is white board, can only use white…
他们的黑板是白色的白板，只能用白板笔在上面写字。（翻译一下）
应用推荐