ตัวกรองผลการค้นหา
คลิกที่แต่ละคำเพื่อดูรายละเอียด
(english) A cutting tool in which the tool bit,the boring bar and in some cases the tool holder are incorporated.
(english) The addition of boron in the range 0.0005-0.005% to certain steels increases the hardenability. A range of boron steels is now listed in the current BS 970 and are widely used for the production of cold headed fastenings.
(english) Any clay suitable for use as a bonding material.
(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) "WHAT A pear-shaped furnace, lined with refractory bricks, that refines molten iron from the blast furnace and scrap into steel. Up to 30% of the charge into the BOF can be scrap, with hot metal accounting for the rest. WHY BOFs, which can refine a heat (batch) of steel in less than 45 minutes, replaced open-hearth furnaces in the 1950s; the latter required five to six hours to process the metal. The BOF's rapid operation, lower cost and ease of control give it a distinct advantage over previous methods. HOW Scrap is dumped into the furnace vessel, followed by the hot metal from the blast furnace. A lance is lowered from above, through which blows a high-pressure stream of oxygen to cause chemical reactions that separate impurities as fumes or slag. Once refined, the liquid steel and slag are poured into separate containers. "
(english) An external force acting throughout the mass of a body. Gravity is a body force. An inertial force is a body force.
(Environmental Engineering) A functional group with an oxygen atom double bonded to a carbon atom.
(เคมี) ผลึกสารประกอบไม่มีสี H4BO3)7 ได้จากปฏิกริยาของ borx กับ aacid ใช้ในทางยาและกันบูดเน่า
(Software Engineering) a black box testing method that designs test cases that exercise data boundaries
ธาตุชนิดหนึ่ง มาจาก boron ใช้ทำน้ำประสาน
(english) Annealing a metal or alloy in a sealed container under conditions that minimize oxidation. In box annealing a ferrous alloy, the charge is usually heated slowly to a temperature below the transformation range, but sometimes above or within it, and is then cooled slowly; this process is also called close annealing or pot annealing.
สลักเกลียวที่ใช้แป้นเกลียว หรือน็อตถ้าชนิดสลักเกลียว แต่ไม่ใช้แป้นเกลียวเรียกว่า machine screw , สลักเกลียว stove bolt มีร่างเกลียวหบายกว่าร่องเกลียวของสลัก machine screw