Papian, described : " Magnetic-Core Storage has two big advantages : ( 1 ) greater reliability with a consequent reduction in maintenance time devoted to storage; ( 2 ) shorter access time ( core access time is 9 microseconds : tube access time is approximately 25 microseconds ) thus increasing the speed of computer operation ."
32.
Disadvantages of these types of pool cleaners are the additional electricity use, and filtration limitation by the pore size of the main filter element, as well as the time and effort needed to attach the device to the ports that connect to the main pump and filter, and the increased burden of maintenance time and expense on the pool's mechanics.
