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ella3714
05.08.2019 •
Engineering
From the list below, select four situations in which casting is the preferred fabrication technique.
(1) when mechanical strength is not an important consideration
(2) for economical producing of parts that require very close dimensional tolerances (e.g. bushing and gears)
(3) for large pieces and/or complicated shapes
(4) for alloys having low ductilities
(5) when it is the most economical fabrication technique
(6) for metals having high melting temperatures
from the list below, select four situations in whi
(1), (2), (4), (5)
(1), (2), (4), (6)
(2), (3), (5), (6)
(2), (3), (4), (6)
(1), (3), (4), (5)
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Ответ:
Antonie van Leeuwenhoek
Explanation: Leeuwenhoek saw a single-celled organism in a sample of pond water in 1675. He was also one of the first microscopists and microbiologists, according to Wikipedia.
Hope this was helped! Let me know if you have any more questions. :)