ตัวกรองผลการค้นหา
คลิกที่แต่ละคำเพื่อดูรายละเอียด
(english) Octagon-shaped wooden stick approximately 5' long. This stick is used in the baller area, to change burr mashers, to start a coil with a large ID, etc.
หนังสัตว์ที่ฟอกแล้ว
พี่น้องตระกูลไรท์ผู้คิดประดิษฐ์เครื่องบิน
เกี่ยวกับความร้อนหรืออุณหภูมิ
(english) The energy stored in deformed elastic material (e.g., a watch spring). Elastic energy equals where k is the stiffness, and is the associated deflection. Elastic energy is sometimes called elastic potential energy because it can be recovered when the object returns to its original shape; see potential energy.
ความดันของอากาศธาตุหรือไอ
(english) The energy stored in a raised object (e.g. the weights in a grandfather clock). Potential energy equals mgh, where m is mass, g is the acceleration of gravity, and h is the vertical distance from a reference location. It is called potential energy because the energy can be regained when the object is lowered. This type of potential energy is sometimes called gravitational potential energy in order to distinguish it from elastic potential energy: see elastic energy.
(Concrete Engineering) Water held on surfaces in a material by either physical and/or chemical forces.
(english) Element N. 5 of the periodic system. Atomic weight 10.82. It is gray in color, ignites at about 1112 (degrees) F. and burns with a brilliant green flame, but its melting point in a non-oxidizing atmosphere is about 4000 (degrees) F. Boron is used in steel in minute quantities for one purpose only- to increase the hardenability as in case hardening and to increase strength and hardness penetration.
(english) Steel wire bright drawn and annealed in controlled non-oxidizing atmosphere so that surface oxidation is reduced to a minimum and the surface remains relatively bright.
(Concrete Engineering) Refined form of an ASTM C618, Class N (natural) pozzolan. A high performance, mineral admixture, similar in performance to silica fume, additionally comparable in cost. Pure white powdered in form will, not effect the natural color or darken concrete as silica fume does. Suitable for high-performance color matching in architectural concrete. Dosage at 5% to 10%, of cement by weight. No bleed water, better finishability, more creamy, cleanup is easier with slightly higher 28 day strengths and 25% - 35% less plasticizer is required than silica fume.
ปรอทวัดบันทึกอุณหภูมิ เป็นปรอทที่มีกลไกบันทึกการเปลี่ยนแปลงของอุณหภูมิตลอดเวลา ตามธรรมดาจะบันทึกลงด้วยเส้นหมึกบนกระดาษแผ่นกลมหรือเป็นกระดาษม้วน