谷氨酸单钠生产技术

producing SLIDE fasteners from plastics or substances in a plastic state

oil-producing country【油气】 工经

device in the bowl producing upwardly-directed sprays

producing strain

pigment-producing rays

producing SPECTACLE(S) frames from plastics or substances in a plastic state

nozzle for producing different kinds of discharge

bimetallic strip for producing fine movements