涩涩欧美,国产精品秦先生手机在线,在线观看国产小视频,人人人人看人人人做人人,又黄又色的美女视频,丰满热舞美女视频,超露美女视频

So far, the most common technologies have been used are open mill mixing and internal mixer mixing, which are called non-continuous mixing. Based on the advantages of both open mill and internal mixer, we have designed the “screw mixing machine” in continuous mixing method and of high efficiency with the strong points as follow.