Today's keyboards mount mechanical keys over electric sensors, most often a two-layer membrane with a suspension layer in between.
如今的键盘机械按键之下装着电子感应器，大部分情况下该感应器是夹有一个悬浮层的两层薄膜。
The elevator USES is the rectangular section rail, can make the engineering staff directly to the working layer, simplifies the project additional complex system and mechanical system.
此种升降机采用的是矩形截面导轨，能够把工程人员直接送到工作层，简化了工程额外的复杂系和机械统。
The important parameters that influence the mechanical property of the paving layer on an orthotropic steel bridge deck are the paving layer thickness and modulus of the asphalt concrete surfacing.
影响正交异性钢桥面铺装层力学性能的重要参数有铺装层的厚度和沥青混凝土铺装层的模量。
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