Tham khảo tài liệu 'dictionary of engineering episode 2 part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | point system pnpn transistor See npnp transistor. Jp eỊenỊpẽỊen pnp transistor electr a junction transistor having an n-type base between a p-type emitter and a p-type collector. ỊpêỊenỊpê pocket build a recess in a wall designed to receive a folding or sliding door in the open position. civeng Arecess made in masonry to receive the end of a beam. pak-st pod I des ENG 1. The socket for a bit in a brace. 2. A straight groove in the barrel of a pod auger. pad Podbielniak extractor chem ENG a solventextraction device in which centrifugal action enhances liquid-liquid contact and increases resultant separation efficiency. pad bel-ne ak Pohle air lift pump mech ENG a pistonless pump in which compressed air fills the annular space surrounding the uptake pipe and is free to enter the rising column at all points of its periphery. po la er .lift .pomp poidometer eng An automatic weighing device for use on belt conveyors. poi dam-sd-or Poincaré surface of section mech A method of displaying the character of a particular trajectory without examining its complete time development in which the trajectory is sampled periodically and the rate of change of a quantity under study is plotted against the value of that quantity at the beginning of each period. Also known as surface of section. . ra ssr-fss sv sek-shsn Poinsot ellipsoid See inertia ellipsoid. pwan so o Poinsot motion mech The motion of a rigid body with a point fixed in space and with zero torque or moment acting on the body about the fixed point. pwan so .mo-shsn Poinsot s central axis mech A line through a rigid body which is parallel to the vector sum F of a system of forces acting on the body and which is located so that the system of forces is equivalent to the force F applied anywhere along the line plus a couple whose torque is equal to the component of the total torque T exerted by the system in the direction F jpwan-soz Ịsen-trol ak-sss Poinsot s method .
