Advantages and disadvantages of hollow bricks
Light weight, high strength, heat preservation, sound insulation and noise reduction performance. Environmentally friendly, non-polluting, it is an ideal filling material for frame structures. The quality indicators of the bricks are in compliance with national standards after inspection. The fatal shortcoming of hollow bricks is that the seismic performance is poor. Among the 25 people who died in the Yingjiang earthquake in Yunnan, 11 were killed because of the collapse of hollow brick houses. Use hollow bricks because it is lighter and will not cause cracks in the floor. In fact, there are many other partition wall materials, including light steel keel gypsum board, steel wire mesh, etc., which are both light and space-saving. Generally, when building a home, the brick wall should be made of 1/2 brick wall. If it is made of hollow brick, the width of the wall is even thicker than 120. The main advantage is that the light weight is the general 95 brick wall 2/3, not right. The structure of the house itself brings too much burden, and the sound insulation effect is also ok, because the holes in the hollow bricks are considered to have sound insulation functions in the arrangement. Relatively speaking, the thickness of the 95 brick wall is the same as that of the hollow bricks. It is slightly better than the hollow brick. It is possible to reduce the pressure on the ground because it is lighter. Can make the internal pressure = external pressure building is not easy to crack! Non-load-bearing hollow brick walls shall have at least three (three) leather solid bricks at the bottom. Car engines are designed around sealed, resilient metal cylinders. Most modern vehicles have between four and eight cylinders, though some vehicles can have as many as sixteen! The cylinders are made to open and close at precisely the correct time to bring in fuel to combine with the spark for burning internally, and to release the exhaust gases produced. While there are several components on an engine, we`ve compiled a list of the most essential car engine parts and their functions, that power your vehicle. Refer to the diagram to locate where they reside on your engine.
Engine valve – This is the very core of the engine. Often made of aluminum or iron, it has several holes to contain the cylinders as well as provide water and oil flow paths to cool and lubricate the engine. Oil paths are narrower than the water flow paths. The engine block also houses the pistons, crankshaft, camshaft, and between four and twelve cylinders-depending on the vehicle, in a line, also known as inline, flat or in the shape of a V.
Pistons – Are a cylindrical apparatus with a flat surface on top. The role of the Piston is to transfer energy created from combustion to the crankshaft to propel the vehicle. Pistons travel up and down within the cylinder twice during each rotation of the crankshaft. Pistons on engines that rotate at 1250 RPM, will travel up and down 2500 times per minute. Inside the piston, lie piston rings that are made to help create compression and reduce the friction from the constant rubbing of the cylinder.
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Timing Belt/Chain – The camshaft and crankshafts are synchronized to ensure the precise timing in order for the engine to run properly. The belt is made of a heavy-duty rubber with cogs to grasp the pulleys from the camshaft and crankshaft. The chain, similar to your bicycle chain wraps around pulleys with teeth.