在这些申请的情况下，光纤电缆应规定保护管，不要频繁移动。

In case of such applications, the optical fibre cable should be laid in protective tubes and not be frequently moved.

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弯曲半径根据电缆截面型号选择，一根保护管最多不能超过三个弯头，垂直弯头不能超过两个。

The arch radius should be chosen according to the model of cable section; there should not be more than 3 elbows on one protecting pipe, and there should not be more than 2 vertical elbows.

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多斯螺旋管（杭州）有限公司主要生产光纤保护管和普通电缆保护管，以及标准淋浴软管和用于医疗设备的金属软管。

DOSFLEX is producing flexible metal tubes for protecting fiber optic cables as well as electrical cables. We also produce standard shower hoses and flexible hoses used in medical equipment.

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