weight - závaží (k vážení či zatížení), činka, kotouč činky

noun - a piece of metal that weighs a particular amount used to measure how heavy something is or to weigh something down; it is also lifted as a sport

lightning conductor - hromosvod

noun, British English - a metal rod on top of a building which is connected to the ground with a wire, it is used to protect the building when there is lightning

lightning rod - hromosvod

noun, American English - a metal rod on top of a building which is connected to the ground with a wire, it is used to protect the building when there is lightning

camouflage - maskování, kamufláž

noun - a way of hiding by means of using the colour of the surroundings; the materials and colours used in the army to make their units difficult to see

printing press - tiskařský lis, tiskařský stroj

noun - a machine or device used to print text or images onto paper or other materials by pressing inked type or plates against them

relay - relé

noun, technical - a device that receives and passes on a signal or an electric current, often used to control a larger electrical system or circuit

 

semiconductor - polovodič

noun - a substance or material that allows electricity to pass through it under some conditions but not under others, used especially in electronic devices

valerian - kozlík, kozlík lékařský

noun, technical - a plant witch clusters of small white and pink flowers whose root is used in medicine, often to help people relax or sleep