This standard specifies the type, system dimensions, and technical requirements for drum assembly and main parts of the rib-type threshing drum. This standard applies to grain combine harvesters and thresher drums.
JB/T 9778.2-1999 history
2018JB/T 9778-2018 Technical conditions of full-feed rice and wheat thresher
1999JB/T 9778.2-1999 Rasp-bar threshing drum.Types dimensions and specifications