law、 Regulations、The State Council has decided that any business prohibited by law shall not be operated; law、 Regulations、 The State Council decided that permission should be granted( Approval) of, After approval by the examination and approval authority,( Approval) Document management; law、 Regulations、 The State Council decided that no license is required( Approval) of, Market entities independently choose to operate。( Electromechanical product technology research、 Development and Application、 Import and export trade; Sale:Mechanical parts, fastener, Standard parts, Hardware products, stamping, Casting, Injection molding products, electronic components, handicrafts, Daily necessities, Mechanical equipment。)