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Use "retro-fitted" in a sentence
"Most designs can be retro-fitted, which is trade-speak for "no need to replace the whole shower fitting", or even to call in the plumber you couldn't find anyway."
"A GPS-equipped motor head and remote control can be retro-fitted to a variety of current Minn Kota bow mounts and cost about $400."
"Both the Soyuz and Proton could be retro-fitted with the NK33/43 engines and in so doing, realise much better performance than current; whilst the Proton would be a safer vehicle in ditching the NTOX/UDMH propellants."