在您的搜寻 主题建议
在您的搜寻 主题建议
Machine-shop practice
Machine-tools
15
Handbooks, manuals, etc
10
Metal-work
6
Congresses
3
Equipment and supplies
3
Laboratory manuals
3
Machinery industry
3
Physical instruments
3
Production engineering
3
Study and teaching
3
Arbitration and award
2
Awards
2
Economic conditions
2
Electric apparatus and appliances
2
Engineering
2
Estimates and costs
2
Foreign population
2
Gages
2
Immigrants
2
Industrial relations
2
Industries
2
Laboratories
2
Literacy
2
Machinery
2
Mathematics
2
Measuring instruments
2
Mechanical engineering
2
Metal-cutting
2
Numeracy
2
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