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1.TYPE DH_2-1 CHROMIUM-ZIRCONIUM-COPPER ALLOY FOR RESISTANCE WELDING ELECTRODE TIPS
DH_2-1型铬锆铜电极合金收藏指正
2.Tip is made chrome, zirconium and copper, and ids cooled with water to slow the abrasion of tip greatly.
电极头采用铬锆铜制作，水冷却，大大减缓电极头的磨损。收藏指正
3.Up to 2007 the company owes more than twenty mining rights, which cover over ten resource such as iron, copper, lead, zinc, manganese, nickel, tungsten, stannum, gold, silver, molybdenum, zirconium, titanium, coal and coal seam gas.
截至2007年初公司拥有矿业权数20余个，涉及铁、铜、铅、锌、锰、镍、钨、锡、金、银、钼、锆、钛、煤、煤层气等十几个矿种。收藏指正
4.The catalytic synthesis of cyclohexanone ethylene ketal with p -toluene sulfonic acid, ferric chloride, tin bichloride, tin chloride, copper sulfate, ferric sulfate, ammonium ferric sulfate, cerium sulfate, zirconium chloride, sodium bisulfate, resin, resin supported Lewis acid, molecular sieve, solid super acid, niobic acid and so on were reviewed.
综述了采用对甲苯磺酸、氯化铁、氯化亚锡、四氯化锡、硫酸铜、硫酸铁、硫酸铁铵、硫酸高铈、四氯化锆、硫酸氢钠、树脂、树脂固载路易斯酸、分子筛、固体超强酸、铌酸等催化剂催化合成环己酮乙二缩酮的方法。收藏指正
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