ตัวกรองผลการค้นหา
คลิกที่แต่ละคำเพื่อดูรายละเอียด
(Concrete Engineering) That portion of an aggregate passing the No. 4 (4.76 mm) sieve and predominantly retained on the No. 200 (74 micron) sieve.
(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.
(english) The process by which a large, stationary stack of steel coils (4 coils high) is subjected to a long heat-treating cycle. This process enables the cold-rolled sheet to fully recrystallize into the softest possible product conforming to customer specifications. Controlling the recrystallization process makes a fine-grained microstructure easy to obtain, and minimizes the tendencies for retention of directional properties of the rolled steel which could produce undesirable shapes in the stamping of a cylindrical part such as a can. Also see Anneal and Continuous Anneal.
(Environmental Engineering) The destruction or inactivation of pathogenic microorganisms. See sterilization.
(Environmental Engineering) The destruction or inactivation of all microorganisms. See Disinfection.
(ไฟฟ้า) หนึ่งในล้านโวลท์
กล้องจุลทัศน์, กล้องส่องขยายดูของเล็กที่ตาเปล่ามองไม่ค่อยเห็น
(Environmental Engineering) A reactor in which the microorganisms are suspended in the wastewater. Examples of suspended growth reactors are activated sludge reactors and anaerobic digesters. See attached growth reactor.
(วิทยุ) คลื่นที่เกิดจากแม่เหล็กไฟฟ้า ซึ่งมีขนาดคลื่นต่ำกว่า 20 เซนติเมตร
เข็มขนาดเล็ก
ความนำไฟฟ้า : การวัดค่าความเป็นสื่อไฟฟ้า ซึ่งจะบอกถึงความเข้มข้นของเกลือมีหน่วยวัด เป็นโมห์ต่อเซนติเมตร (mhos/cm.) เช่น น้ำสำหรับการชลประทานโดยทั่วไปแล้วควรมีค่าไม่เกิน 750 micro mhos/cm.
(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.