tincalconite
... 硼砂球 borax bead 硼砂石 tincalconite 硼石髓 haytorite ...
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硼砂石蜡准直仪 borax-paraffin collimator
硼砂石蜡准直器 borax-paraffin ; collimator ; borax-paraffin collimator
硼砂矿石 Borax Ore
用硼砂石墨型粒状渗硼剂对45钢进行了高温长时间深层渗硼。
Deep boronization of 45 steel was conducted at high temperature for a long time using granular boronizing agent containing borax and graphite.
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