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Lean-burn concepts are often used for the design of heavy-duty natural gas, biogas, and liquefied petroleum gas (LPG) fuelled engines. These engines can either be full-time lean-burn, where the engine runs with a weak air–fuel mixture regardless of load and engine speed, or part-time lean-burn (also known as "lean mix" or "mixed lean"), where ...
The standard was published in October 2003, splitting off from ISO 3864:1984, which set out design standards and colors of safety signage and merging ISO 6309:1987, Fire protection - Safety signs to create a unique and distinct standard for safety symbols.
A NO x adsorber is designed to reduce oxides of nitrogen emitted in the exhaust gas of a lean burn internal combustion engine.Lean burn engines, particularly diesels, present a special challenge to emission control system designers because of the relatively high levels of O 2 (atmospheric oxygen) in the exhaust gas.
On roadside warning signs, an exclamation mark is often used to draw attention to a generic warning of danger, hazards, and the unexpected. In Europe and elsewhere in the world (except North America and Australia), this type of sign is used if there are no more-specific signs to denote a particular hazard.
Lean air is a gas mixture with an oxygen content lower than 20.95% (the oxygen content of the normal breathing air).Lean air is made from a gas mixture of air with nitrogen or of pure oxygen with nitrogen and is used in several production processes where a product covering with pure nitrogen can be dangerous, undesirable or more expensive.
Since the late 1990s, the most common technology used in new installations for variable message signs are LED displays. In recent years, some newer LED variable message signs have the ability to display colored text and graphics. Dot-matrix variable message signs are divided into three subgroups: character matrix, row matrix, and full matrix.
Signage is the design or use of signs and symbols to communicate a message. [1] [2] Signage also means signs collectively or being considered as a group. [3] The term signage is documented to have been popularized in 1975 to 1980. [2] Signs are any kind of visual graphics created to display information to
Lean Project Management applies the five principles of lean thinking to project management. [4] "Lean" is a systematic method for the elimination of waste ("Muda") within a manufacturing system. Lean also takes into account waste created through overburden ("Muri") and waste created through unevenness in work loads ("Mura"). Working from the ...