Gōngdì shang gōngrén men yòng bùhuàjī xiétiáo gōngzuò.
Workers on the construction site coordinated their work with walkie-talkies.
Tips
memory
步话机 = 步 (step/walk) + 话 (speech/talk) + 机 (machine) - a machine you can walk around and talk with. A very literal and descriptive name for a walkie-talkie!
