the postulated role of nitrate in the causation of cancer.
假设的硝酸盐的致癌作用。
the postulated role of nitrate in the causation of cancer.
假设的硝酸盐的致癌作用。
The paper introduces the solution methods of belt-distortion on pipy belt-conveyor by analyzing the phenomenon and causation of belt-distortion on pipy belt-conveyor.
本文通过对管状带式输送机胶带扭曲现象及原因进行分析,介绍了处管状带式输送机输送带扭曲的方法。
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