Machinery, Machinery, Machinery

Such as the materials that they are built on , don't melt when entering Fukushima Nuclear Plant .
I am reminded of the robot "scrubbers" that were sent into the reactor at the 3 mile island facility.
(during which, the value of an epoxy paint was demonstrated.)
Look at the Rover program which provided us with data way above expectation.
Opportunity (MER-B), Mars Exploration Rover, launched on July 7, 2003[8] and landed on January 25, 2004. Opportunity surpassed the previous records for longevity at 5,352 sols (5498 Earth days from landing to mission end; 15 Earth years or 8 Martian years) and coverance of 45.16 km (28.06 mi). The rover sent its last status on 10 June 2018 when a global 2018 Mars dust storm blocked the sunlight needed to recharge its batteries.[11] After hundreds of attempts to reactivate the rover, NASA declared the mission complete on February 13, 2019.
Curiosity of the Mars Science Laboratory (MSL) mission by NASA, was launched November 26, 2011[12][13] and landed at the Aeolis Palus plain near Aeolis Mons (informally "Mount Sharp")[14][15][16][17] in Gale Crater on August 6, 2012.[18][19][20] The Curiosity rover is still operational as of May 2020.
It likes to take selfies...hehe...
Examples of instruments
Opportunity's first self-portrait including the camera mast on Mars
(February 14−20, 2018 / sols 4998−5004) It was taken with its microscopic imager instrument