we: heating part is separated , the above temperature can not reached the bottom of the machine ,can protect the electronic components inside the body more effectively, make the machine's life more longer, also safer for the operator

others: Heating part is together,the temperature inside is very high, have an influence to the life of the electronic components, also has risk to the operator


we: the bottom of the machine is together, to prevent the occurrence of sag of the body in the transport process

others: split type touch welding, solder joint easy to fall off, is easy to sag in the transport process