3.2 光纤输入安装
※ 将QBH水平放置,取出防尘密封盖。
3.2 Fiber input installation
Put QBH horizontally and take out the dust seal cover
取出防尘盖
※ 光纤头上红点对准QBH红点，慢慢将光纤头插入QBH中。
Align the red point on the optical fiber head with that in QBH, and insert the optical fiber head into QBH slowly.
两中心红点对齐插入安装
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