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"Clarinet:a woodwind instrument having a straight, cylindrical tube with a flaring bell and a single-reed mouthpiece, played by means of finger holes and keys."

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A woodwind instrument having a straight, cylindrical tube with a flaring bell and a single-reed mouthpiece, played by means of finger holes and keys.

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A woodwind instrument having a straight, cylindrical tube with a flaring bell and a single-reed mouthpiece, played by means of finger holes and keys.

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In this paper,concrete filled steel tube short column with dumbbellshaped cross section is studied by finite element method,further analysis on the influence of concrete grade and steel ratio on confining force,and stress distribution and other properties of the core concrete in web cavity of the column under load is carried out.

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Durng the construction of continuous underground wall, after the hole is drilled by special drilling machine to set depth, grout is first pressed via the core tube of drilling rod to the hole, sealing device and the reinforced bar cage are then set in the hole, and concrete is finally deposited with the displaced grout is recovered.

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The computational model andsimulation method are tested by post-process and visualization of experimentalresults. The application of 2-D Particle Image Velocimetry is also discussed.8 Optimal design of the furnace tube system in an ethylene-cracking furnace isstudied as a practical example. Screw-pitch of the static mixer unit andinstallation layout of tubes with static mixer is discussed.

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The invention is characterized in that the mouth of a sample tube is provided with a four-way valve and a buffer tank provided with a jacket, the sample in the buffer tank is blown by nitrogen gas to be completely fed into a sample bottle to realize accurate sampling.

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