’k’-class estimator

0 class

1 000 MW class air-cooled unit

10000-ton class train

1000MW class ultra supercritical unit

1-D largest intra-class variance

1st class certisify seed potato

1st Class or 2nd Class Control

20 kV voltage class

200 t-class ESR furnace

20kV voltage class

300 MWe-Class Circulating Fluidized Bed(CFB) boiler

3he Jinping Second Class Hydropower Station

Ⅲ class equation

4-class

5 class marking system

500kv voltage class

600 MW class

600MW class units

610 MPa class