Smear head

A smear head causes less stagnation and overpacking than a nonreturn valve. A conventional-type reverse-tapered nozzle with the bore as large as possible without sudden changes in diameter is preferred. Independently controlled, zone-type heaters for heating the nozzle and at least two zones on the cylinder are used. 

An alternative to the check ring valve is a smear head (Fig. 6.33), which is based on the use of a small clearance in the diameter over significant land length. This design restricts the back flow of the melt during... 

History (previous crises, previous medications, recreational drug use), physical examination (mandatory fundoscopic examination, blood pressure on all limbs), urinalysis, and electrolytes, blood urea nitrogen, creatinine, peripheral blood smear, complete blood count, electrocardiogram (ECG), chest X-ray, and head CT... 

Figure 3.58. (a) Normalized X-ray reflectivity (R/Rj,) as a function of the scattering vector transfer for arachidic acid monolayers on pure water (T = 20°C). For better visibility the curves marked (, yand 5 are displaced upward by 0.25, 0.5 and 1.0, respectively. Here a, /3, yand 6 correspond to the surface pressures indicated in the tc[a ] isotherm of the insert, (b) Two-box density profile used to fit the data in (a). The boxes describing the tall region (T) and the polar head region (H), respectively, are smeared by a Gaussian, as indicated by the solid line. (Redrawn from J. Als-Nielsen and K. Kjaer, loc. cit.)... 

The gashed heads turned to the Rifleman, and now it seemed that they knew Why the face that had never a smear of blood was stained to the jawbones, blue. 

By means of the Gouy-Chapman assumptions (21, 22) the entropy of compression of a smeared-out head group charge, and its associated... 

Thank you." He picked up the mug and plate, glancing around. There were only three other people in the cafe. A young couple were oblivious to anything but each other. "Mind if I sit here " he asked the third, a woman in her late twenties, making no attempt to cloak herself in any kind of image. Her head came up to show tear trails smearing chubby pale cheeks. 

In BS903, Part A9, the ISO method is one of four standard tests, the others being the DuPont, the Akron, and the Taber or rotary platform double head type machine. Like the ISO method, the DuPont test is one of continuous abrasion against a replaceable abrasive paper, this time of silicon carbide rather than of aluminum oxide, but there is no built-in procedure to avoid abrasive smearing and progressive changes in abrasive power other than a rotation of test pieces to even out differences. The Akron method involves the wear... 

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