The wheel hub is a cylindrical metal part used to support the tire. It is the part where the axle is installed in the center line of the wheel. It is also an important part of the linkage brake disc

The blade disk is one of the core components of the turbomachinery. Among all kinds of turbomachinery blade disks

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Zong Dawei is a diplomat with multi-national rescue experience. Even though he seems tired of this job

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Roulette is a casino game which was likely developed from the Italian game Biribi. In the game, a player may choose to place a bet on a single number, various groupings of numbers, the color red or black, whether the number is odd or even, or if the number is high or low.