IEC 60297-3-109:2015规定了机箱和相关印刷板的尺寸和物理特性，以便为嵌入式计算设备提供机械和环境完整性。它们用于各种应用，如机器控制、医疗、运输、航空航天和电信，通常基于单板计算机。为了便于定义合适的底盘和相关的单板尺寸，本标准基于44,45 mm（1,75 in）的结构网格。 关键词:尺寸，机械结构，机箱，嵌入式计算设备

IEC 60297-3-109:2015 specifies dimensions and physical properties of chassis and associated printed boards in order to provide mechanical and environmental integrity for embedded computing devices. They are used in various applications such as machine control, medical, transportation, aerospace and telecommunication, typically based on single board computers. For the easy definition of the suitable chassis and associated single board dimensions, this standard is based on a structural grid of 44,45 mm (1,75 in). Key words: Dimensions, Mechanical Structures, Chassis, Embedded Computing Devices