ผลการค้นหา

Boron (chemical symbol B)

แปลว่า(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.

minute

แปลว่าประณีต, พิถีพิถัน; นาที

Air Entraining Agent

แปลว่า(Concrete Engineering) An addition for hydraulic cement, or an admixture for concrete or mortar which entrains air in the form of minute bubbles in the concrete or mortar during mixing.

revolution per minute

แปลว่าอัตราการหมุนจำนวนรอบ (เท่านั้น) ต่อนาที (อักษรย่อ R.P.M.)

Mixing Speed

แปลว่า(Concrete Engineering) Rate of mixer drum rotation or that of the paddles in a pan, open-top, or trough type mixer, when mixing a batch; expressed in revolutions per minute (rpm) or in peripheral] feet per minute of A point on the circumference at maximum diameter.

R.P.M

แปลว่าอักษรย่อของคำว่า revolution per minute = จำนวนหมุนรอบต่อนาที

comminute

แปลว่าบดให้แตกละเอียด, ทำให้เป็นผง

Basic Oxygen Furnace (BOF)

แปลว่า(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. "

min

แปลว่าอักษรย่อของคำว่า minim = หยด, minimum = ขีดต่ำที่สุด, minor = เล็ก, minute = นาที

revolutions per minute

แปลว่าจำนวนหมุนรอบต่อนาทีของเครื่องจักร ซึ่งมีอักษรย่อ r. f. m.