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特意查了一下建议书里各类光纤的模厂直径建议值：
个人感觉还是尽量减少熔接点，尽量避免不同类型光纤对接，改进熔接工艺；其他的都是物理特性决定的，很难再减小。:L

652ABCD
Range of nominal values 8.6-9.5 μm
Tolerance ±0.6 μm
653A
Range of nominal values 7.8-8.5 m
Tolerance ±0.8 m
653B
Range of nominal values 7.8-8.5 m
Tolerance ±0.6 m
654A
Range of nominal values 9.5-10.5 m
Tolerance ±0.7 m
654B
Range of nominal values 9.5-13.0 m
Tolerance ±0.7 m
654C
Range of nominal values 9.5-10.5 m
Tolerance ±0.7 m
655C
Range of nominal values 8-11 μm
Tolerance ±0.7 μm
655D
Range of nominal values 8-11 μm
Tolerance ±0.6 μm
655E
Range of nominal values 8-11 μm
Tolerance ±0.6 μm
656
Range of nominal values 7.0-11.0 m
Tolerance ±0.7 m
:L :L