You can use palm stones for many purposes, including relaxation, energy boost, protection, and meditation. Holding a palm stone in your hand creates a strong connection between the stone's energy and your energy field or aura. Due to their oval or round shape, you can easily carry them in your purse or pocket to have them with you throughout your dayhttp://www.robingemstone.com/palm-stone/

The working environment of civil aviation engines is very harsh, under high temperature and high pressure for a long time, the internal temperature is as high as 2000 ℃, so if the potential safety hazards are not eliminated in time, it may cause serious consequenceshttp://www.riouendoscope.com/industrial-endoscope/

It is an electric switch (patented in 1932) that is actuated by very little physical force. Switching happens at specific positions of the actuator (not like other switches). Relatively small movement at the actuator button produces a relatively large movement at the electrical contacts, which occurs at high speed (regardless of the speed of actuation). http://www.jxnma.com/mirco-switch/

Cosmetics are not a modern invention. Humans have used various substances to alter their appearance or accentuate their features for at least 10,000 years, and possibly a lot longer.http://www.jianfengchemical.co....m/cosmetics-raw-mate

Precision Investment Casting, also referred to as lost wax casting, is a process in which metals are casted into different shapes using wax and ceramics to act as the mould for the casting. This is one of the oldest known techniques for metal casting and has stood the test of time over centuries.http://www.disoncasting.com/pr....ecision-investment-c

Air operated diaphragm metering pumps use compressed air to drive a double diaphragm (two diaphragms) alternatively. A shuttle valve alternates the air flow between the two diaphragms. The flow of the media that is being pumped is adjusted by how much air pressure is supplied to the pump.http://www.depamupumps.com/metering-pump-1

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