These are ceramic housed low-inductive resistors with ceramic rod wirewound core and are almost universally used in the far east for almost all radio, TV and industrial equipment applications. This
series enjoys the following distinct advantages over normal coated resistors:
1. As the resistive element is hermetically sealed in a ceramic case using a cement  which enjoys flame retardant properties even at high
overload, no damage can be caused to neighbouring components.The
2. Due to very high degree of insulation and low surface temperature, these resistors can be mounted with their bodies relatively closer
to the PCB.
3. These resistors are also commonly referred to in the far east as cement resistors owing to the nature of their construction.
4. In certain markets, these resistors are also wrongly called fusible resistors.
Note:
Due to recent technological advances, the ceramic cases used may be steatite ceramic or corderite ceramic or high alumina ceramic
depending on the nature of the application. Hence the ceramic cases may be off-white or variations of brown and variations of grey;
colours which are inherent to these ceramic materials.