... screener 1) Non gear driven variable speed case 2) No need for lubrication 3) No oil leakage SFJY ... design and durable, no powder, mucus can be screening. 2. Changer is easy, simple, easy to clean. 3. ... be a continuous operation. 5. Unique grid design, screen using a long time, for only 3-5 minutes ... size, less space and easy to move. 7. Screen machines can reach five, it is recommended to use ...