YG381A型用于搖取棉、化纖紗線。按GB/T9996標準檢查紗線外觀評級，還可按GB/T403-78標準進行測試。
YG381M型用于搖取毛、麻紗線。按FZ/T20017標準檢查毛紗外觀評級。
　　Model YG381A is used for winding and taking cotton yarn or chemical fiber yarn. Check the appearance of yarn and appraise its grade in accordance with GB/T9996 and can also test in accordance with GB/T403-78.
　　Model 381M is used for winding and taking wool yarn or hemp yarn. Check the appearance of yarn and appraise its grade in accordance with FZ/T20017.
　　
主要技術參數：Main Technical Data：
1、黑板機規格 Sizes of black board
　　　　　　　　YG381A:250*180*2mm
　　　　　　　　YG381M:300*225*5mm
2、搖紗密度 Density of rocked yarn：
　　　　　　YG381A:7、9、11、13、15、19根pieces/10mm
　　　　　　YG381M:35、45、55根pieces/10cm
3、外形尺寸 Outline size：
　　　　　　YG381A:L630*W430*H400mm
　　 　　　　YG381M:L600*W420*H400mm