👷⛑️⛏️

#miner #mining worker #hard hat #labor #mine safety #tambang batu bara #tambang emas

👷🔦⚫

#miner #headlamp #coal #mine safety

🐦⛏️👷

#canary #coal mine #mine safety #historical mining #gas detection #miner

⛏️║🌬️

#mine ventilation #mine partition #air control #mine safety #coal mine #tunnel ventilation

🐤⛏️💀

#canary in a coal mine #mine safety #toxic gas detector