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清管器技术的发展很快，目前已开发出的清管器种类多达300余种。尽管如此，有关专家仍在潜心专研，力争研制出适用范围更广、测量精度更高的清管器。
Pigmentation technology developed rapidly, has developed as many as 300 species of pigs. In spite of this, the relevant experts are still devoting themselves to specialization and strive to develop pigs with a wider range of applications and higher measurement accuracy.