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| persulphide (a sulphide containing more sulphur than some other compound of the same elements) | |||
| персульфид: 1 phrase in 1 subject |
| Chemistry | 1 |
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| persulphide (a sulphide containing more sulphur than some other compound of the same elements) | |||
| персульфид: 1 phrase in 1 subject |
| Chemistry | 1 |