Use APKPure App
Get ラッキング サイズ選定アプリ：Racking old version APK for Android
It is an application that can select the size of racking used for equipment construction etc.
It is an application that selects the size of racking, which is coated with a heat insulating material on boiler piping, cold water piping, refrigerant piping, etc. mainly for the purpose of heat insulation and cold insulation.