When power is lost, manual & electric dual purpose elevator can also be used.

手电两用升降机无电时也能使用。

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In conventional elevator controls, high accurate sensors of position and speed are used for this purpose. However these additional sensors increase the cost of system and decrease the reliability.

在传统的电梯曳引系统中，通常采用高精度的位置和速度传感器来检测转子的位置和速度信息，增加了系统的成本，降低了系统的可靠性。

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Remarkability may be the Higgs boson of brand messaging: more atomic than things like unique selling propositions, elevator speeches and even purpose statements.

FORBES: Remarketability: How To Make Your Brand Contagious