"ethenes" meaning in English

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          "text": "The chlorinated ethenes were determined gas chromatographically with N 2 as carrier gas using two bonded-phase fused silica capillary columns.",
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        "plural of ethene"
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          "text": "The chlorinated ethenes were determined gas chromatographically with N 2 as carrier gas using two bonded-phase fused silica capillary columns.",
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