

The primary function of oil seals is to retain lubricant within a mechanical assembly. In the absence of an effective seal, lubricants can escape from the machinery, leading to increased wear and tear on moving parts, reduced efficiency, and potential failures. In industries where machinery operates under high temperatures and pressures, such as automotive, aerospace, and manufacturing, the significance of oil seals is magnified.
Two major materials used for the construction of manhole cover are cast iron and concrete. These two materials are also used in combination with the construction of manholes. Both the materials are durable, heavy and inexpensive. With technology, manhole covers are made from fiberglass, plastic, and composite.
Beyond their functional utility, street dustbins have social implications as well
. They promote civic responsibility and encourage a culture of cleanliness within communities. When people see well-placed dustbins that are regularly emptied and maintained, they are more likely to use them instead of throwing garbage on the ground. This creates a sense of shared responsibility among citizens, fostering a culture where individuals care for their environment and contribute to the community's well-being.