protecting angle 保护角
The principal cause of lightning stroke failures occurred in UHV transmission lines is the shielding failure, so it is suggested to adopt the negative protecting Angle for UHVDC transmission lines.
引起特高压输电线路雷击故障的主要因素是雷电绕击，建议特高压输电线路采用负保护角运行。
This thesis is concerned about the handicapped from the Angle of employment, and is on the purpose of protecting the handicapped form an active way by advancing their abilities of self-security.
本文从就业的视角关注残疾人问题，旨在通过提升残疾人自我保障能力以真正实现残疾人的社会融合，从而以更加积极的方式给与残疾人社会保护。
When the linear length of the protecting pipe is over 30m, the junction box should be added; and when there are more than 2 right-angle bends, junction box should be added between them.
保护管直线长度超过30 m时需加装接线盒，同一管线超过两个直角弯时应加设中间接线盒。
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