r3-1
Technological developments played a large role in the commercialization of lumbering. The thick saw blades that had originally been used were very inefficient, wasting as much as a third of each log, which would be left behind as sawdust or scrap. However, in the 1870s, the British-invented band saw, with its thinner blade, soon became the preferred cutting tool in the lumber factories throughout the Great Lakes states.
Technological developments played a large role in the commercialization of lumbering. The thick saw blades that had originally been used were very inefficient, wasting as much as a third of each log, which would be left behind as sawdust or scrap. However, in the 1870s, the British-invented band saw, with its thinner blade, soon became the preferred cutting tool in the lumber factories throughout the Great Lakes states.
r3-1
Technological developments played a large role in the commercialization of lumbering. The thick saw blades that had originally been used were very inefficient, wasting as much as a third of each log, which would be left behind as sawdust or scrap. However, in the 1870s, the British-invented band saw, with its thinner blade, soon became the preferred cutting tool in the lumber factories throughout the Great Lakes states.
***I received the copy, Sean. Next time, please send the materials in the ‘Request’. Thank you.
***FYI: This is the reading material from the student’s book that he would like to use in our class. No need for correction.
수강정보
필리핀 화상영어 주 3회 25분 24주
튜터
J Ann
교재
TOEFL Map Speaking (Basic)
[시니어]
어학시험 TOEFL Speaking
