This paper illustrates not only the test results of pure refrigerant R22 evaporating in spirally grooved, cross - grooved and herringbone tubes, but also the results of replacing refrigerant R407C evaporating in these enhanced tubes.
The intersecting welded circular and square tube arc truss structures were used to the whole roof covering an area of about 160000m2. This is one of the largest scale structural hollow section welded joint structure used in China. The triangular varying section (shuttle shape) herringbone columns with the heights of 16~37m and the roofing box ribbed metal deck with 12 m and 14 m span were first applied in this country.
The results showed that microstructures of PMS coating were very complicated, and distributed in different regions in the coating. The surface layer consisted mainly of cross-shaped primary carbide Fe_3W_3C, herring bone structure(γ-Fe+Fe_3W_3C), black belt around the herring bone structure, and the matrix.
The molecular packing arrangements inI andII are distinctly different,I possessing a layer structure while inII the packing is based on a herring bone motif.
The nanoindentation technique was used to characterize the indentation modulus of intramuscular herring bone (Clupea harengus) along its length, from early to fully mineralized regions.
Histologically, the tumour consisted mainly of a uniform proliferation of elongated spindle cells arranged in a herring bone pattern, simulating fibrosarcoma.
They consisted of a collection of filamentous structures of two types: (1) a regular array of filaments 100 ? in diameter which sometimes were arrayed in perpendicular planes and (2) another type in a herring bone or ladder-like pattern.