footage drilled per shift 每班进尺

footage drilled per bit 每个钻头进尺

drilled footage 钻进进尺 ; 钻探进尺

drilled footage per day [矿业] 台日进尺

drilled footage per month [矿业] 台月进尺

drilled footage per shift [矿业] 台班进尺

total drilled footage 总钻井进尺

drilled footage per regrinding 磨次进尺