mineral
boring
derrick
block and tackle
haul
rotate
cutting bit
geologist
coring bit
cylinder
strata
circulate
gusher
tbii-post
虔诚 | 专注 | 积少成多
tbii-post
mineral
boring
derrick
block and tackle
haul
rotate
cutting bit
geologist
coring bit
cylinder
strata
circulate
gusher