ShinEtsu信越硅橡胶SEPX-616-U SEPX-617-U SEPX-633-U耐高温硅胶 ¥90.00 $DOW道康宁RBB-2880-30 RBB-2880-40 RBB-2880-50高透明食品级硅胶 ¥0.10 蓝星bluestar AD703 稳定添加剂有机硅胶抗老化耐热耐高温助剂 ¥400.00 DOW道康宁RBB-2880-60 RBB-2880-70 RBB-2880-80食品级硅胶 耐高温 ¥0.10 $DOWCORNING道康宁RBB-6300-30 RBB-6400-40 RBB-6500-50 硅胶原料 ¥35.00 $陶氏DOW道康宁硅橡胶RBB-2030-40 RBB-2030-80原NPC透明硅胶 ¥95.00