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It can ensure the safety, extend the life-span of the equipment, avoid creepage and fire and can clean the part out of reach.

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MP9 submachine gun features three positions safety / fire mode selector with "safe","semi-auto" and "full-auto" positions, as well as a separate firing pin block to increase safety.

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Four major aspects, i.e., traffic safety, function and service, disaster prevention and control and traffic control should be considered in the design of the traffic engineering facilities of highway tunnels, which consist of traffic signs and traffic mark lines, traffic monitoring facilities, ventilation and lighting facilities, trumpet call system, fire alarming system, fire fighting and escaping facilities, power supply and distribution facilities, central control and management system.

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Model 635 has three-position safety-fire selector with available modes of fire of semi-auto and full-auto.

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Based on hazard analysis of using elevator to evacuate, improving measures are proposed from the self-safety of elevators, air supply, elevator partition and power supply. Finally, the safety and rationality of the model is studied. The result indicates that it is feasible to use elevators for evacuation during the initial stage of high-rise building fire.

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Knowing the different classifications of fire extinguishers are a good way to ensure your health and safety should you have to deal with a fire.

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