activating tungsten inert-gas welding with direct current straight polarity mode

after treatment with copper

analogous prussian blue film doped with copper Ⅱ i

Casting with copper mould

chelate of L-aspartic acid with copper

copper loss

copper(Ⅱ)-copper(Ⅱ)

crude Copper with high content Silver

fracture zone with copper and gold

modified with copper ion

porphyric rockbody with copper and molybdenum

Regenerated gas washed with copper liguor

pyridine-2-carboxylic acid copper copper picolinat

pyridine-3-carboxylic acid copper copper nicotinat

circulating current loss

direct loss

direct loss of industrial accidents

disaster direct loss

eddy current loss

loss current