The bed length of a lathe is the total length of the bed way from where it starts to (close to the headstock) to where it ends. When a lathe is advertized for sale it would show for example: 200mm x 1000mm or 8 x 40. The 200mm or 8 describes the swing of the machine and the 1000mm or 40 descrâ¦.
There are many different animal classes and every animal in the world belongs to one of them. The five most well known classes of vertebrates (animals with backbones) are mammals, birds, fish, reptiles, amphibians.
Eutheria, the Placental Mammals. Placental mammals are a rather diverse group, with nearly 4000 described species, mostly rodents and bats (photos at left). The placental mammals include such diverse forms as whales, elephants, shrews, and armadillos. They are also some of the most familiar organisms to us, including pets such as dogs and cats, as well as many farm and work animals, such as sheep, cattle, and horses. And humans, of course, are also placental mammals.