| 摘要 |
The rectifier is formed by two concentric pipes which are disposed to define a counter-current flow path and a plurality of spherical calotte-shaped or similar indentations in the outer pipe. The indentations are formed simultaneously in staggered rows (1) to divide the flow path into a plurality of small parallel passages and (2) to secure and fix the mutual position of the two pipes relative to each other. The cross-sections of the formed passages have a maximum linear dimension of five millimeters (5 mm.).
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