The High Strength rods must be equivalent to Norris 97 API Grade Special with Tensile.KSi 140150翻译上面那句话.是有关抽油杆的内容. norris抽油杆

The High Strength rods must be equivalent to Norris 97 API Grade Special with Tensile.KSi 140/150翻译上面那句话.是有关抽油杆的内容. The High Strength rods must be equivalent to Norris 97 API Grade Special with Tensile. KSi 140/150 高强度抽油杆的强度必须相当于美国Norris公司生产的97型抽油杆用钢，以及美国石油学会特殊材质构件标准，达到140/150千磅/平方英寸的拉伸强度。