#side_chemical {float:left;width:181px; height:620px; margin-bottom:6px;}
#side_chemical1 {float:right;width:159px; height:620px; background:#efefef;}
#side1_chemical_s {float:left;width:181px; height:475px;}
#main_chemical {float:right; width:838px; height:620px; margin-left:3px;margin-bottom:6px;}
#main_chemical_box {float:left; width:816px; height:462px; border-bottom: 1px solid #069fa5;}
#main_chemical＿bt {float:left; width:818px; height:27px; margin-top:3px;}
#main_chemical＿bt span {float:left; margin-left:8px; font-size:16px;}
#main_chemical＿bt img {float:left; margin-top:7px; margin-left:10px;}
#main_chemical_wz {float:left; width:798px; height:140px; margin:10px 0 0 10px;}
#main_chemical＿bt2 {float:left; width:818px; height:25px; border-bottom: 1px solid #069fa5; margin-top:10px;}
#main_chemical＿bt3 {float:left; width:121px; height:25px; background:#069fa5;}
#main_chemical＿bt3 span {float:left;color:#FFF; margin-top:1px; margin-left:10px;}
#main_chemical＿bt3 img {float:left; margin-top:6px; margin-left:10px;} 
#main_chemical＿box1 {float:left; width:262px; height:220px; border:1px solid #dedfe1; margin:10px 12px 10px 0; text-align:center;}
#main_chemical＿box1_img {float:left; width:260px; height:159px; margin-top:18px; margin-bottom:10px;}
#main_chemical＿box2 {float:left; width:262px; height:220px; border:1px solid #dedfe1; margin:10px 0px 10px 0; text-align:center; }
#main_chemical＿box2_img {float:left; width:260px; height:159px; margin-top:18px; margin-bottom:10px;}