亚洲AV无码乱码精品国产-91在线无码精品秘?入口竹美-人妻无码中文久久久久专区-亚洲国产成人精品无码区蜜臀

    Polyol blending system is used to mix the main polyether, additives, foaming agents and other auxiliary materials in proportion to form polyol with different formulas. It is widely used in the fields of household appliances, automobiles, insulation materials and so on. It has high mixing precision, low labor intensity and good environmental protection.