10 cm houfnice vz. 30 (howitzer) the field and mountain gun roles into one weapon. The Czechoslovak army decided to adopt it to replace their plethora of aged Austro-Hungarian field guns. They replaced the wheels with modern rubber-tired wheels, but curiously chose to retain the crewman's seat on the Gun shield. It used the same carriage as the 8 cm kanon vz. 30 that could break down into three pieces for transport . It fired a shell. 10 cm houfnice vz. 30 (howitzer) The 10 cm houfnice vz. 30 (howitzer model 30) was a Czechoslovak howitzer used in the Second World War. The 158 weapons captured
Field emission gun Field emission gun A field emission gun is a type of electron gun in which a sharply pointed Müller-type emitter is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at the emitter surface to cause field electron emission. Emitters are either of cold-cathode type, usually made of single crystal tungsten sharpened to a tip radius of about 100 nm, or of the Schottky type, in which thermionic emission is enhanced by barrier lowering in the presence of a high electric field. Schottky emitters are made by coating a tungsten tip