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Pressure upon special light that is a stainless steel ring.
压光带为一经特殊处理的不锈钢环状钢带。
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The stainless steel seat ring is manufactured with a slight inside taper.
不锈钢阀座密封环制成内部锥度。
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The stainless steel seat ring is manufactured with a slight inside taper.
不锈钢阀座密封环制成内部锥度。
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