
Since the year 2009, Gravel Industries Co. Ltd (Gravel Enterprise HK Co. Ltd) has been investing and developing on several fields, vacuum sputtering thin film coating for chips of semi‐conductor and mirco‐electronics, diversities of industrial ceramic materials and precision moulding & machining components, and thermal plastic injection tool / zamak casting tool design & build and related moulding parts. Dedicate the good service before and after sales to the overseas and domestic customers in the ...