Weifang Sehenda Machinery Co., LTD is major in plastic machinery and is one of the biggest manufacturer of plastic hollow units. Its main product is plastic machinery. The main products of plastic machinery are automatic hollow plastic unit, pull units, film unit, strapping machine, crusher, extruder. Its annual sales are nearly 100 million yuan. The company focuses on new product development and technological innovation.*€*€And the company has developed hollow units of 50-3000L with 3layers in sequence.