Limnoperna fortunei can attach to the inner walls of raw water pipe by thread-like byssus and reproduced rapidly, resulting in clogging of pipe and valves.
These mail-wagons were two-wheeled cabriolets, upholstered inside with fawn-colored leather, hung on springs, and having but two seats, one for the postboy, the other for the traveller.
In order to lower residual heat on the surface of the block,the cooling mans is installed in interwall of the block.The wortle is soaked in cooling watr to reduce its working temperature.