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ค้นเจอ 173 รายการ

Biofilm

(Environmental Engineering) A film of microorganisms attached to a surface, such as that on a trickling filter, rotating biological contactor, or rocks in natural streams.

System engineering

(Software Engineering) focuses on the analysis and design of all elements of a complete product, service, or technology for the transformation of information or control

Ball Burnishing

(english) A method of obtaining a high luster on small parts by rotating them in a wooden-lined barrel with water, burnishing soap, and stainless steel shot.

Equilibrium:

(english) An object is in equilibrium if the resultant of the system of forces acting on it has zero magnitude. See static equilibrium and dynamic equilibrium.

Bandsaw

(english) A power saw, the blade of which is a continuous,narrow,steel band having teeth on one edge and passing over two large pulley wheels.

Couple:

(english) A system of forces composed of two equal forces of opposite direction, offset by a distance. A couple is statically equivalent to a moment whose magnitude equals the magnitude of the force times the offset distance.

Colloids

(Environmental Engineering) Small particles which have a negligible settling velocity. These particles have a very small mass so gravitational force is low compared to surface frictional forces. Typical colloidal sizes range from 10-3 mm to 1 mm.

water, hygroscopic

น้ำที่หุ้มเม็ดดิน : น้ำหรือความชื้นในดินซึ่งจับยึดติดแน่นเป็นเยื่อบาง ๆ รอบเม็ดดิน แรงจับยึดนี้มีมากจนพืชไม่สามารถดูดน้ำไปใช้ได้ และน้ำไม่สามารถเคลื่อนที่ได้ด้วยแรงดึงดูดของโลกและแรงดูดซึม (capillary force) บางทีเรียกว่า hygroscopic moisture

Blister 2

(english) A defect in metal, on or near the surface, resulting from the expansion of gas in a subsurface zone. Very small blisters are called pinheads or pepper blisters.

B Elevation

(english) The bottom level of the boiler firebox where two oil guns are located. The oil guns are used if the boiler needs extra steam while on oil fire.

Blister

(english) 1) Coating defect consisting of the formation of bubbles in a coating, which appear as hemispherical elevations. The blisters are hollow, and are usually caused by entrapped air or solvent. 2) A raised spot on the surface on the surface of metal due to expansion of gas which causes a subsurface metal separation such as inclusions and small laminations.

Pin support:

(english) In two dimensions, a pin support restrains two translation degrees of freedom but does not restrain rotation. When considering reaction forces, a pin support is usually considered to have two force components: one each about the x and y axes respectively.

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