工具書 (gung1 geoi6 syu1) — trade book; reference book in Cantonese
gungˉ¹工geoiˍ₆具syuˉ¹書简 工具书
Mandarin Pinyin: gong1 ju4 shu1
Meaning of 工具書
nountrade book; reference book
Characters in 工具書
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