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1·Thinly coat sealing lip and outer circumference of sealing ring with vaseline.

将密封圈的外圆和密封唇上涂上一层薄薄的凡士林。

2·Thinly coat outer circumference and sealing lip of sealing ring with vaseline.

将密封圈的外缘和密封唇上涂上一层薄薄的凡士林。