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Makalah Tentang Mesin Bor
Angga Prasetyo | 13.05 |
MESIN BOR
- A. Definisi Mesin Bor
Mesin bor adalah suatu jenis mesin
gerakanya memutarkan alat pemotong yang arah pemakanan mata bor hanya pada
sumbu mesin tersebut (pengerjaan pelubangan). Sedangkan Pengeboran adalah
operasi menghasilkan lubang berbentuk bulat dalam lembaran kerja dengan
menggunakan pemotong berputar yang disebut BOR.
Makalah Alat Perkakas
Angga Prasetyo | 13.01 |
ALAT-ALAT PERKAKAS
Alat
Perkakas adalah alat untuk menunjang
pekerjaan yang berhubungan dengan pemahatan, penandaan atau pengerokan,
diantaranya:
Ø Ragum
Ø Kikir
Ø Pahat
Ø Palu
Ø Obeng
Ø Sekrap tangan
Ø Kunci
Ø Gergaji tangan
Teks Deskriptive
Angga Prasetyo | 17.59 |
Niagara Falls
Niagara Falls is a famous area of waterfalls. It is one of the most beautiful natural wonders of North America. It is on the Niagara River, about halfway between Lake Erie and Lake Ontario. The Niagara River forms part of the border between Canada and the United States. At Niagara Falls, Ontario, Canada is on one side of the river, and the United States of New York is on the other side.
Niagara Falls really has two
waterfalls. The Horseshoe Falls are in Canada, and the American Falls are in
the United States.
The Niagara River drops into a steep
gorge or canyon, at the falls. Most of the water flows over the Horseshoe
Falls. They are not as high as the American Falls, but they are 2,600 feet
wide–about 0.5 mile The American Falls are about 1,000 feet wide.
Beyond the falls are the Whirlpool
Rapids. There, the powerful swirling water has carved a bowl out of the rock.
At night, coloured lights shine on the thundering falls. About 10 million
people visit Niagara Falls each year.
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