公司主要产品：OEM方式生产不锈钢耐热钢碳钢合金钢等材质的各类高档次精密铸件以及深加工产品。
Our main products: stainless steel heat resistant steel, carbon steel alloy (OEM), various grades of precise casting and further processed products.
通过试验分析，认为钻铤材质和螺纹加工质量合格，钻铤粘螺纹与钻铤材质和加工质量无关，其主要原因是井队操作不当所致。
The failure of thread stick has nothing wrong with drilling collar and thread machining, it is only cause by uncorrected operation on site.
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