It is fast and convenient, and the cost is much lower than that of the special ultrasonic welding machine for car door panels.
Ọ dị ngwa ngwa ma dịkwa mma, ọnụ ahịa ya dịkwa ala karịa nke nke igwe mgbatị pụrụ iche maka oghere ọnụ ụzọ ụgbọala.