Complex sentence: The bow is coated with horsetail hair and inseparably interlaced with the string-pairs; in Chinese this is called "sihu", that is "four", also meaning, "having four ears".
Split into simpler sentences: The bow is coated with horsetail hair and inseparably interlaced with the string-pair. A four-stringed version is called the "si'khuu or sihu", that is "four", also meaning, "having four ears".