Writing drills: Industry and manufacturing: HSK 7-9, part 2 工业生产：HSK 七至九级（2） 写字练习
The characters that the words of Industry and manufacturing: HSK 7-9, part 2 write for the first time in the List, a few to a drill. Each drill takes its characters from tracing them, with the next stroke shown, to writing them from memory.
2 drills over 8 characters.