仅有15%的国家有涉及五个主要危险因素的综合性法律：超速驾驶、酒后驾车以及摩托车头盔、安全带和儿童约束装置的使用。
Only 15% of countries have comprehensive laws relating to five key risk factors: speeding, drinking and driving, and the use of motorcycle helmets, seat-belts and child restraints.
在额定功率因素上施加150%额定负荷，并测量逆变器保护装置启动所需时间。
Apply150% rated load at rated power factor and measure the time required for the inverter protective devices to operate.
桥梁伸缩装置疲劳寿命要受到各种因素的影响。
The fatigue life of the bridge expansion device are influenced by many factors.
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