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| затвор клапана (The internal elements of a valve are collectively referred to as a valve's trim. The trim typically includes a disk, seat, stem, and sleeves needed to ... Alexander Demidov) | |||
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| затвор клапана (The internal elements of a valve are collectively referred to as a valve's trim. The trim typically includes a disk, seat, stem, and sleeves needed to ... Alexander Demidov) | |||