| Catalogue |
| Supplier | Country | Telephone |
| Beijing Channel Scientific Instruments | China | 15611261324 |
| Olympus Europa SE & Co. KG | Germany | +49 (0) 40 23773 5913 |
| hero pharma | China | 2323233 |
| Ahmed Abass Trading | United Kingdom | +44998877665 |
| ME conference | United Kingdom | 44-2088190774 |
| meilu company | China | 13601481300 |
| CVDT 2018 | United Kingdom | +442039363178 |
| NANJING CHANNEL TECHNOLOGY | China | 15611261324 |
| RADICAL SCIENTIFIC EQUIPMENTS PVT. LTD. | India | +91-171-2600801, 2891500 |
| EndoGastric Solutions | United States | 4253079200 |
| Zhejiang Jinhua Huahai Science And Educational | China | 0579-82160889 |
| Nanjing Channel Scientific Instruments Co., Ltd. | China | 15611261324 |
| ColVisTec | Germany | +49 30 6392 7815 |
| LANDTEK INSTRUMENTS | China | 0086-20-81609313 |
| Conference Series LLC Ltd., | United Kingdom | 1-650-889-4686 |
| Research Chemicals LLC | United States | +13035696802 |
| Conferenceseries LLC Ltd | United Kingdom | +17025085200 |
| meditech.com.cn | China | 86-532-85832673 |
| nanjingkexuequdaoyiqi | China | 15611261324 |
| nanjingkexuequdao | China | 15611261324 |