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ค้นเจอ 278 รายการ

Wagner Fineness

(Concrete Engineering) The fineness of materials such as portland cement expressed as total surface area in centimeters per gram as determined by the Wagner turbidimeter apparatus and procedure.

Beckmann apparatus

เครื่องวัดความเย็นจัดถึงร้อนจุดน้ำเดือน ของน้ำยาละลายต่าง ๆ

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.

parallelepiped

รูปทรงบาศก์ มีด้านขนานกัน แต่ไม่เป็นมุมฉาก

Burr

(english) The very subtle ridge on the edge of strip steel left by cutting operations such as slitting, trimming, shearing, or blanking. For example, as a steel processor trims the sides of the sheet steel parallel or cuts a sheet of steel into strips, its edges will bend with the direction of the cut.

retarding the spark

การหน่วงประกายไฟสะป๊าค กล่าวคือการทำให้การจุดประกายที่หัวเทียนเกิดขึ้นหลังจากลูกสูบชักขึ้นไป จนสุดและผ่านไปแล้ว และกำลังจะถูกดึงกลับลงตามจังหวะ

adjustable parallels

แท่งโลหะหรือไม้รูปลิ่มสองแท่ง สำหรับจัดแต่ระยะให้เพิ่มขึ้นหรือลดลง

Component (of a vector):

(english) Any vector can be expressed as a collection of vectors whose sum is equal to the original vector. Each vector in this collection is a component of the original vector. It is common to express a vector in terms of components which are parallel to the x and y axes.

parallelogram

รูปสี่เหลี่ยมด้านขนาน

Bainite

(english) A eutectoid transformation product of ferrite and a fine dispersion of carbide, generally formed at temperatures below 840 to 930 F (450 to 500 C): upper bainite is an aggregate containing parallel lath-shape units of ferrite, produces the so-called feathery appearance in optical microscopy, and is formed at temperatures above about 660 F (350 C); lower bainite consists of individual plate-shape units and is formed at temperatures below about 660 F (350 C). Also, a slender, needle-like (acicular) microstructure appearing in spring steel strip characterized by toughness and greater ductility than tempered Martensite. Bainite is a decomposition product of Austenite best developed at interrupted holding temperatures below those forming fine pearlite and above those giving Martensite.

Yield stress:

(english) A material loaded beyond its yield stress, no longer exhibits linear elastic behavior. Metals, particularly mild steel, generally have a very well defined yield stress compared to other materials. Yield stress is sometimes called yield strength.

pearl spar

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