近来根多读者来信询问有关钻粒钻进的原理问题，为了回答这一同类性质的问题，我们请王人杰同志综合写了这篇文章，由于问题本身远非几千字所能说清楚，因此只能作为一般性介绍，读者若想做进一步探讨，希参阅有关参考书籍。 In order to answer the question of the nature of this type of drilling, we asked Comrade Wang Renjie to write this article in a comprehensive way. Since the issue itself is far more clear than thousands of words, Only as a general introduction, the reader if you want to further explore, hope to refer to the reference books.