A plain taper attachment for the lathe is illustrated in Figure7-69. A bed bracket attaches to the lathe bed and keeps theangle plate from moving to the left or the right. The carriagebracket moves along the underside of the angle plate in adovetail and keeps the angle plate from moving in or out onthe bed bracket.
The Bryozoa, also known as Polyzoa, Ectoprocta or commonly as moss animals, are a phylum of aquatic invertebrate animals.Typically about 0.5 millimetres (0.020 in) long, they are filter feeders that sieve food particles out of the water using a retractable lophophore, a crown of tentacles lined with cilia.nother group of animals discovered subsequently, whose filtering mechanism looked similar, was also included in Bryozoa until 1869, when the two groups were noted to be very different internally. The more recently discovered group was given the name Entoprocta, while the original Bryozoa were called Ectoprocta.
Ectothermic vertebrates belonging to the class Amphibia are collectively known as Amphibians. The term âectothermicâ means the physiological heat sources of these animals are insufficient for maintaining the proper body temperature. Amphibians belong to the superclass Tetrapoda or tetrapod. Frogs, toads, salamanders, newts and caecilians are different animals in the Amphibia class. The term Amphibian was derived from the Greek term âamphibiousâ, which means âboth livesâ or âtwo livesâ (âamphiâ meaning âbothâ and âbiosâ meaning âlifeâ).