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Attention to fiber wiring - cleaning and testing.

Update:2017-12-18

Before laying the cable, the tube holes should be cleaned and tested. When cleaning, the despotic brush tool is used. After cleaning the brush, the test bar is used for the test. The inner diameter of the plastic tube should be 1.5 times the outer diameter of the optical fiber cable. When in a cement pipe hole  put two or more of the pipe when the pipe diameter should be less than the total equivalent pore diameter 85%.

http://www.optical-patchcord.com/

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