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一种可长期保护螺栓在使用中免遭环境腐蚀和因温度作用而发生咬合的新材料——螺栓保护剂在浙江衢州合力新材料厂开发成功。
A long-term protection of bolts in use from environmental corrosion and temperature due to occlusion of the new material - Bolt protective agent in Zhejiang Quzhou Heli new material plant development success.