It can be widely used in irregular stuff, goods in bulk and high-low drop height transportation. It can be used as electric devices, industrial accessories, food packaging assemblies, etc. Its working rhythm is featured with disorder with its speeds able to be adjusted to requirements. Indirect belt carriers cooperate direct ones to conduct perfect corners transportation, with the goods remaining in certain position along with the transportating belts. In addition, straight line continuous transportation, continual transportation, adjusted transportation as well as other ways can be achieved with controlling.