A cutter chain on an armored flexible conveyor that cuts its own stable holes;
pushed by pulsating rams; height, 18 in (45.7 cm); minimum workable seam, 20 in
(50.8 cm); on gradients 0 degrees to 20 degrees ; maximum length of face, 45 yd
(40 m). Nelson
Source:
Dictionary of Mining, Mineral, and Related Terms
