Ib qho khoom lag luam mining saum toj kawg nkaus tuaj xyuas peb uas tab tom nrhiav kev daws teeb meem lojmining iav.Lawv tau hu rau ntau tus neeg muag khoom ua ntej lawv tuaj, tab sis lawv tsis tau txais cov lus pom zoo ntawm kev muab vim yog kev loj hlob ntim.

Thaum lawv tuaj, peb tau qhia lawv tsis yog peb lub zog cylindrical xwb tab sis kuj muaj peev xwm bevel iav, lawv zoo siab heev thiab zoo siab.

Tus thawj coj yuav khoom James tau cog lus rau kev sib txuas lus sib sib zog nqus rau tag nrho lawv nplhaib iavthiab bevel gears tej yaam num.