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德國schunk公司是zui大的碳刷/高溫石墨生產廠商之一，為varain（瓦里安）生產的原子吸收光譜提供石墨管OEM代工，訂購時您只需提供varain（瓦里安）的貨號，就能找到相同品質，但價格更加實惠的schunk產品，常用規格如下列表：
| varian石墨管貨號 | Schunk貨號 | 產品描述 | 包裝 |
| 63-100011-00 | 10154328 | Plateau tube, coated | 10根/PK |
| 63-100014-00 | 10154331 | Plateau tube, uncoated | 10根/PK |
| 63-100013-00 | 10154357 | Bone platform, pyrolytic graphite （for use in plateau tubes） | 10根/PK |
| 63-100012-00 | 10154329 | Partition tube, coated | 10根/PK |
| 63-100015-00 | 10154356 | Partition tube, uncoated | 10根/PK |
| 63-100012-HP | 10160980 | Partition tube, coated （HP） | 10根/PK |
| 63-100012-EL | 10159128 | Partition tube, coated （EL） | 10根/PK |
| n/a | 10289537 | Omega Platformtube | 10根/PK |
| 63-100018-00 | 10157015 | Shroud | 10根/PK |
| 63-100016-00 | 10159059 | Electrode | 10根/PK |
| 63-100019-00 | 10157017 | Zeemann Shroud | 10根/PK |
| 63-100017-00 | 10159060 | Zeemans Electrode | 1根/PK |
| 63-100023-00 | 10155810 | Forked platformtube, coated | 2根/PK |
| 63-100024-00 | 10155807 | Forked platformtube, pyrolytic graphite | 1根/PK |
| 63-100023-90 | 10155808 | Coated tube with preinserted forkshaped PyG platform | 2根/PK |
