The "low rate" of a washing machine is not a standard or widely used term in the context of washing machines. It is possible that you might be referring to different things:
Low Spin Speed: Washing machines often have multiple spin speed settings. The spin speed determines how fast the drum rotates during the spin cycle to extract water from the clothes. A "low rate" in this context would refer to a low spin speed setting. Low spin speeds are suitable for delicate fabrics or clothes that require gentler handling.
Energy Efficiency: Some washing machines are rated for their energy efficiency. They may have a low rate of energy consumption, meaning they use less electricity or water per wash cycle, which can be more cost-effective and environmentally friendly in the long run.
Water Consumption: Similarly, some washing machines are rated based on their water consumption. A low rate of water consumption means the machine uses less water per cycle, which can be beneficial for regions with water scarcity or to reduce water bills.
Noise Level: Some washing machines are marketed as having a "low rate" of noise, meaning they produce less noise during operation, which can be desirable for households where noise is a concern.
If you can provide more context or clarify what you mean by "low rate" in the context of a washing machine, I can provide a more specific answer. Otherwise, the factors mentioned above are the typical interpretations related to the term "low rate" in the context of washing machines.