内蒙皮 meaning in Chinese

inner covering
inner skin

There are 500 ton and 315 ton oil pressure , and 176 sets of kinds of machine process and checking equipments in the factory . the mould we designed are economical applied and low making charge short period . we produce back - door level air - spring , jack , brake oil pipe , accelerator pedal for micro car and engine mid - parts , gemel , tri - way air pipe , adiabatic board and other welding parts
工厂主要生产微型汽车系列背门撑杆制动油管千斤顶等总成，以及发动机仓中置构件侧围顶上内蒙皮等冲焊件，已形成年产30万车付的能力，其中背门支撑杆制动油管供应量占了长安公司一半以上。