成人伊人亚洲综合久久网,97超级碰碰碰久久久久总站,欧美日韩一区二区三区四区高清,国产精品久久久久久三级,欧美日韩精品高清一区二区,久久不免费视频1国产日韩一品道,一区二区亚洲国产精品,亚洲精品??一区二区,一区二区三区中文字幕亚洲伦理

lt requires to provide 80℃-100℃ hot water through the steam or electric heating; it supplies hot water to the heating layer of the water-bath glue-melting tank or other equipments for circulated use; its main part is refined with stainless steel; and its provided with such units as a liquid level meter，a thermometer and a safety valve，which is a supportive device for glue melting, proportioning and cleaning.