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陕西汉中国营东方仪器厂研制的NJ-2～NJ-5000(扭矩为2～5000Nm)系列扭矩扳子检定仪,获得了陕西省技术监督局颁发的计量器具许可证。同时获得中国专利,专利号为ZL99234430.1。
NJ-2 ~ NJ-5000 (Torque is 2 ~ 5000Nm) series Torque Wrench tester developed by Hanzhong State-owned Oriental Instrument Factory in Shaanxi Province, and obtained the license of measuring instruments issued by Shaanxi Provincial Bureau of Technical Supervision. At the same time access to Chinese patent, patent number is ZL99234430.1.