... single-seat 单座的 single seated main stop valve 单座式主汽门 single-seat valve 单座阀 ...
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... single-bearing machine 单轴承电机 single-beat main stop valve 单座式主汽门 single bed filter 单层滤料滤池(器) ...
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单座式主汽门 single beat main stop valve; single seated main stop valve; single-beat main s ..
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