Trimethylhydroxyethyl ether: The star material of space robotic arm lubricant In the vast universe, the space robot arm is like the right-hand assistant of astronauts, performing various difficult tasks in space. The role of lubricant is crucial to make these robotic arms run flexibly. Trimethylhydroxyethyl ether (TMHEE) under the MIL-PRF-27617F standard is such a high-end...