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Cross-sectional view of a double-twist region. The director is parallel to the tube axis at the center, twisting along any radius. The energy of such a configuration is lower than for twist in a single direction, but only near the center. In a double-twist tube, the angle at the edge is 45 .

Cross-sectional view of a double-vortex spray chamber.

Cross-sectional view of a dual-piston reciprocating pump. From Walker JQ, Jackson MT Jr, Maynard JB

Cross-sectional view of a flame ionization detector. .

Cross-sectional view of a flame photometric detector. Dual-flame photometric detector for sulfur and phosphorus compounds in gas chromatographic effluents. Anal cal Chemistry 50

Cross-sectional view of a glass membrane containing two different cations , three of which are in the same plane, with an additional oxygen atom above or below it.

Cross-sectional view of a graphite furnace . K

Cross-sectional view of a hard coal-fired steam generator of a modern 600 C power plant EnBW Kraftwerke AC

Cross-sectional view of a horizontal vessel, multi-element pressure filter with vertical leaves showing the in situ and extracted positions of the filter leaves.

Cross-sectional view of a Langmuir-Blodgett trough.

Cross-sectional view of a liquid cell for in-situ AFM measurements of surface processes.

Cross-sectional view of a low-level anti-coincidence beta-particle counter A. Sample on a planchet. B. Thin window detector. C. Guard detector. Lead shielding surrounds the entire detector system. Typical background count rates are about 1 count per minute for beta particles and 0.1 count per minute for alpha particles. A sample mounted on a planchet responds to beta particles from the sample. For low-activity samples, the probability is low that a particle from the sample registers a pulse at the same time that the counter is inactivated.

Cross-sectional view of a matrix-isolation, hollow-cathode, sputtering device. See ref. 200 for explanation of components. The letters indicate the following stopcock knob.

Cross-sectional view of a matrix-isolation, hollow-cathode, sputtering device. See ref. for explanation of components. The letters indicate the following

Cross-sectional view of a membrane-moderated transdermal drug delivery system showing major structural components.

Cross-sectional view of a microflash vaporizer direct injector.

Cross-sectional view of a microscale spectroscopic vessel for monitoring reactions in SCFs C CaF2 window P port S stainless steel window holder and T Teflon O-ring .

Cross-sectional view of a muiti-channcl monolithic membrane element Courtesy of U.S. Filter

Cross-sectional view of a n-channel MOSFET.

Cross-sectional view of a NaCl ionic crystal

Cross-sectional view of a nanochannel structure covered by a Si02 Si3N4 membrane .

Cross-sectional view of a pair of hexalobal mixing elements of counterrotating, intermeshing TSEs. Courtesy of C. Martin, American Leistritz Extrusion Corp.

Cross-sectional view of a PD TFT

Cross-sectional view of a photoioniaation detector. .

Cross-sectional view of a picture element. From T. Tsukada et al., Solid-state color imager using a-Si



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