coper造句
(1) Wrot coper is exclusively used for fittings.
(2) DTU 60.5 - Building works - Coper piping - Supply hot and domestic water , drainage of water , rainwater, air conditioning installations - Technical specifications.
(3) Wrot copper performs well in high temperature applications and is easily joined by soldering or brazing . Wrot coper is exclusively used for fittings.
(4) The sample is treated with hydrochloric acid and hydrogen peroxide. The analytical conditions have been studied. The elements of coper, iron and zinc can be determined in the presence of lead and tin.
(5) This paper, based on cointegration theory, empirically analyses the relation of future and present prices of coper in Shanghai market.