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Floor tiles are commonly made of ceramic or stone, although recent technological advances have resulted in rubber or glass tiles for floors as well. Ceramic tiles may be painted and glazed. Small mosaic tiles may be laid in various patterns. Floor tiles are typically set into mortar consisting of sand, cement and often a latex additive. The spaces…[ 続きを読む ]

Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. The disease has since spread worldwide, leading to the ongoing COVID-19 pandemic. Symptoms of COVID‑19 are variable, but often i…[ 続きを読む ]

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants,…[ 続きを読む ]

A centrifuge is a device that uses centrifugal force to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or liquids from solids. It works by causing denser substances and particles to move outward in the radial…[ 続きを読む ]

Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine…[ 続きを読む ]

Corrugated is the structural form of building materials, which can be made of a variety of special materials. It is mostly made of aluminum, which is used for anti-corrosion and thermal insulation. The dimensions of corrugated are divided into: A, B, C, E and F. Corrugated plate and corrugated aluminum plate are applicable to the roof, wall and…[ 続きを読む ]

A compactor is a machine or mechanism used to reduce the size of material such as waste material or bio mass through compaction. A trash compactor is often used by a home or business to reduce the volume of trash it produces. A baler-wrapper compactor is often used for making compact and wrapped bales in order to improve logistics. Normally…[ 続きを読む ]

Slippers are a kind of shoes. The heel is empty, and only the front has a toe. Most of them are flat bottoms. The material is often quite light and soft leather, plastic, cloth and so on. The types of slippers are distinguished according to the wearing occasion and performance purpose. For example, beach slippers are not made of cloth, but…[ 続きを読む ]

A motorcycle, often called a motorbike, bike, cycle, or (if three-wheeled) trike, is a two- or three-wheeled motor vehicle. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising, sport (including racing), and off-road riding. Motorcycling is riding a motorcycle and being involved in other…[ 続きを読む ]