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| пластинчатый откидной клапан; захлопочный клапан | |||
| шарнирный вентиль; откидной вентиль | |||
| пластинчатый клапан | |||
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翻 板阀 : 6 phrases in 2 subjects |
| Electronics | 2 |
| Technology | 4 |
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