kathodal opening contraction 阴极断电收缩
Contraction Joint Opening 横缝开度
contraction joints opening 横缝开度
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By adopting the expansion and contraction property of the thermo-sensitive wax, the temperature control valve controls opening and closing of the valve core.
它采用热敏蜡的热胀冷缩性能来控制阀芯的开启与关闭。
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