The Pilotfish ATR chassis was designed with "modular design, thermal design, EMC design, mechanical strength, and serviceability design" in mind, and was manufactured with an internal structure that looks like this.
The Pilot Fish ATR chassis includes quick-extractable mounting brackets for electronics and equipment, perfect for the kind of harsh environment resistant applications that require quick insertion of fixing and extraction. China's ATR chassis design specifications, chassis form and mounting dimensions of the relevant national military standards, the main standards are as follows:
GJB? 441-1988 airborne electronic equipment chassis and mounting brackets in the form of the basic dimensions.
GJB? 779-1988 General specification for airborne electronic equipment chassis and mounting bracket.
GJB? 780-1989 Basic dimensions of mounting brackets and accessories for airborne electronic equipment.
GJB? 150A Outline of environmental tests for military equipment