人妻综合网,深夜影院操一操,中文字幕有码在线播放,欧美精品第1页

YD237耐磨藥芯焊絲                                                                                                     化學(xué)成分，                                                                                                                   (Q)≤0.60　1.50-2.50　　Cr5.0-10.0，Mo1.5-2.5，V0.5-1.0硬度≥60，                規(guī)格                                                                                                                1.2/1.6/2.0CO2                                                                                                                常溫高硬度堆焊，用于鼓風(fēng)機(jī)葉片 ，對(duì)輥，輸送輥，礦山機(jī)械等耐磨的堆焊，