CHR507Mo低氢型直流1Cr13阀门堆焊CHR507MoNb低氢型直流1Cr13阀门堆焊CHR517低氢型直流2Cr13阀门堆焊CHR547MoA低氢型直流高压阀门堆焊CHR547Mo低氢型直流高压阀门堆焊CHR577低氢型直流高压阀门堆焊CHR608石墨型交直流泥沙磨损及轻***击件堆焊CHR618石墨型交直流耐泥沙、气蚀磨损件堆焊CHR646低氢型交直流高温磨损件堆焊CHR648石墨型交直流高温磨损件堆焊CHR678石墨型交直流泥沙及冲击件堆焊CHR698石墨型交直流泥沙及强磨损件堆焊CHR707低氢型直流泥沙及强磨损件堆焊)