Skip to main content
Skip to content navigation
Menu
University Libraries
UNT Digital Library
University Libraries Site Links
About the UNT Libraries
Libraries: Research
Libraries: Services
Libraries: Spaces
Libraries: News
Libraries: Calendar
Site Search Options
Search
Guided Search
Advanced Search
Proximity Search
Searching Help
Explore
Overview
Collections
Partners
Titles
Locations
Resource Types
Dates
Tour
About
Overview
Purpose
Collaboration
Technology
Policies
Statistics
API
Help
Accessibility
Contact Us
Home
Collections
Partners
Titles
Locations
Types
Dates
Explore
Overview
Collections
Partners
Titles
Locations
Resource Types
Dates
About
Overview
Purpose
Collaboration
Technology
Policies
Statistics
API
Help
Accessibility
Contact Us
Tour
Contact Us
You Are Here:
University Libraries
UNT Digital Library
UNT Libraries Government Documents Department
About
All Pages
An Investigation of Explosion-Proof Motors
(Listing Multiple Pages).
Search Inside
Search
Search Inside
Search Related
or search
all
1,521 items in the series: United States Bureau of Mines Reports
or search this site for
other
reports
Pages
This report has 56 pages. Select a thumbnail to view a larger version.
1
2
3
4
5
6
7
8
9
10
10A
10B
11
12
12A
12B
13
14
14A
14B
15
16
16A
16B
17
18
18A
18B
19
20
20A
20B
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Back to Top of Screen