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密封圈要抱緊電纜或?qū)Ь€,同時(shí)擠實(shí)引入裝置的內(nèi)孔,達(dá)到致密效果。常用尺寸有:11x4x10,12x8x10,18x8x10,20x10x7,22x10x11,23x10x11,24x11x11,27x11x13,30x11x15,33x13x15,35x11x15,38x11x15,40x11x20,42x11x20,110x35x45,120x40x40,125x40x47,128x40x47,18x7x20,18x6x20,20x6x20,22x6x20,27x6x20,32x7x20,32x10x32,35x8x20,39x12x20,40x12x25。