byq features：
1. adopt advanced length-counting device to provide accurate length-ounting.
2. with variable frequency speed control and no pull, it can adjust the tifhtness of reals at random.
3. have automatic trimming funtion.
technical criteria
model | width
（mm） | maximum drum
diameter
（mm） | speed
（m/min） | trimming tolerance
（%） | external dimension
（mm3） | voltage
（v） | weight（kg） | length-counting tolerance
（%） |
ybq | 1800-2400 | 350 | 38 | ≤ 0.5 | 3300 x 1550 x 900 | 380 | 800 | ≤ 0.3 |