कोयले की खान, भूरा कोयला, खुले गड्ढे मे खनन, खुदाई, उद्योग, साधन, बिजली का उत्पादन, औद्योगिक परिदृश्य, खोदक मशीन, बाल्टी पहिया खुदाई, वातावरण
Public Domain
प्रासंगिक तस्वीरें
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