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Brinell Hardness Number

(english) The value of hardness of a metal on an arbitrary scale representing kg/mm2, determined by measuring the diameter of the impression made by a ball of given diameter applied under a known load. Values are expressed in Brinell Hardness Numbers, BHN

Blush

(english) A coating defect consisting of the whitening of a cured film which results in a translucent or opaque appearance with accompanying loss of gloss. Blushing usually occurs during the pasteurization or steam processing of films which are undercured or water sensitive.

Synergism is the act of working together

(Environmental Engineering) Two chemicals which are synergistic have a greater effect together than the sum of their individual effects. The effect can be either positive or negative.

Beryllium Copper

(english) An alloy of copper and 2-3% beryllium with optionally fractional percentages of nickel or cobalt. Alloys of this series show remarkable age-hardening properties and an ultimate hardness of about 400 Brinell (Rockwell C43). Because of such hardness and good electrical conductivity, beryllium-copper is used in electrical switches, springs, etc.

Mass balance

(Environmental Engineering) An organized accounting of all inputs and outputs to an arbitrary but defined system. Stated in other terms, the rate of mass accumulation within a system is equal to the rate of mass input less the rate of mass output plus the rate of mass generation within the system.

Ottawa Sand

(Concrete Engineering) A sand used as a standard in testing hydraulic cements by means of mortar test specimens. Sand is produced by processing silica rock particles obtained by hydraulic mining of the orthoquartzite situated in open-pit deposits near Ottawa, Illinois; naturally rounded grains of nearly pure quartz.

Brown Sharp Gages

(english) A standard series of sizes refered to by numbers, in which the diameter of wire or thickness of sheet metal is generally produced and which is used in the manufacture of brass, bronze, copper, copper-base alloys and aluminum. These gage numbers have a definite relationship to each other. In this system, the decimal thickness is reduced by 50% every six gage numbers- while temper is expressed by the number of B&S gage numbers as cold reduced in thickness from previous annealing. For each B&S gage number in thickness reduction, where is assigned a hardness value of 1/4 hard.

eight-cylinders in line

เครื่องยนต์ชนิด 8 สูบเรียง

tunnelin in rock

การขุดอุโมงค์ลอดใต้เขา เช่น ถ้ำอุโมงค์ของรถไฟ

drive in restaurant

ภัตตาคาร ชนิดจอดรับประทานในรถ โดยมีคนเดินเสิร์ฟ

running in mileage

กำหนดระยะบังคับสำหรับรถใหม่ ซึ่งจะเร่งเครื่องได้เต็มที่จนกว่าจะใช้วิ่งมาแล้วตามจำนวนไมล์ที่กำหนดไว้

low in line

(การพิมพ์) เหลื่อมเส้นบรรทัด คือตัวอักษรที่เรียงอยู่ต่ำกว่าตัวอักษรใกล้ชิดกัน

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