Скачать или смотреть plumb bob (in Civil Engineering)

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Recommended for English learners with TOEFL iBT:72–120, IELTS: 5.5–9.0, Cambridge English: 160-230, TOEIC: 1560–1990, 実用技能英語検定(英検)準1級-1級
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This video is designed for English learners who hope to expand their advanced English vocabulary with texts from academic fields.
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Assisted by Claud, with some edits by the web content creator

Video Title: #plumb bob

#Civil Engineering

subtitles

plumb bob
Ensuring Vertical Precision
in Construction
A plumb bob is an essential tool in civil engineering
for establishing true vertical lines
Engineers rely on the plumb bob
when laying foundations for buildings
The tool consists of a pointed weight
suspended from a string
Gravity pulls the plumb bob downward
to create a perfectly vertical reference
This simple device has been used
for thousands of years
For example,
ancient builders used the plumb bob
to construct pyramids
They suspended the weight
from a cord
at the structure's edge
The plumb bob indicated
whether walls were rising vertically
Workers adjusted stones
until alignment was achieved
Similarly,
modern surveyors use the plumb bob
for precise measurements
They position the tool
over ground markers
during site surveys
The plumb bob helps transfer points
from one elevation to another
This ensures accurate vertical alignment
throughout the construction process
Therefore,
the plumb bob remains valuable
despite technological advances
Engineers often combine it
with laser levels
and digital instruments
The plumb bob provides
a reliable backup
when electronic devices fail
Its accuracy depends only on gravity
and careful observation
Construction crews keep a plumb bob
in their standard toolkit
The device works equally well
in remote locations
without electricity
Bridge builders use the plumb bob
when installing
vertical support columns
In summary,
the plumb bob is
a fundamental instrument
that ensures vertical accuracy
in civil engineering projects
across all scales
So plumb bob means
"a weight suspended from a string
used to establish
a vertical reference line
through gravitational force"
This definition emphasizes
both the tool's physical composition
and its practical function
Synonyms include
plummet
vertical level indicator
and plumb-line
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