| 摘要 |
1327763 Treating water FISONS Ltd 7 Aug 1970 [29 Aug 1969 12 Sept 1969 27 Oct 1969] 43041/69 45124/69 and 52439/69 Heading C1C A halogen donor used for treating water is contained in a dispenser having a permeable wall with all its pores less than 0À3 mm. |
