Elevators ; electric and electrohydraulic elevators, escalators, moving sidewalks and ramps
20
| Main Author: | |
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| Format: | |
| Published: |
New York : MaGraw-Hill,
1960
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| Subjects: |
20
| Main Author: | |
|---|---|
| Format: | |
| Published: |
New York : MaGraw-Hill,
1960
|
| Subjects: |