... aluminium frame: 1.OEM services,R&D speaker part mold 2.15 year experiences of speaker ... , A360, ADC12, AlSi12Cu, ADC1, LM6-M, LM20-M, Zamak3, Zamak5, ect.R&D capacity:Professional tooling development & process & designProduction ... treatmentProduction Areas:Auto parts, motorcycle parts, pump parts, locomotive parts, machinery parts, tool parts, furniture parts, ect.Ningbo Jiahui Machine Parts Co., Ltd ...