| | 美国UIC CM191-006 BUSHING, THREADED W/ O-RING直销电话：4006609565 | 8 | ￥800.00 | ￥800.00 | | ￥800.00 |  |
| | Cole-Parmer EW-70792-33 pH Chemical Feed System, Two Pumps, 4.3 GPH, 50 psi, 230V | 937 | ￥93762.00 | ￥93762.00 | | ￥93762.00 | |
| | 英国Whatman 1541-125，定量滤纸―硬化无灰级Grade 541 : 22 μm，12.5cm | 3 | ￥326.00 | ￥326.00 | | ￥326.00 | |
