Sigma-Aldrich二氯甲烷 ≥99.8% 广州绿百草科学仪器有限公司

p1Src=//y1.yzimgs.com/uploads/322496/2020122-151442423.jpg?watermark/2/text/5bm_5bee57u_55m-6I2J56eR5a2m5Luq5Zmo5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/650/fill/I0E3QTlBOA==/gravity/SouthEast"

aa