摘要:

The Utility Department of Margate, Florida installed blue double reflectors on streets throughout the city to mark the locations of valves in the street and in the area between sidewalks and curbs. Reflector installation is combined with valve inspection and repair, and the city's records and maps are updated and corrected at the same time.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00657.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

This month's portion of “Certification Corner” features questions on venturi tubes, chlorine dosage calculations, water use calculations, iron removal, well screen mesh size, calculation of filter surface areas, and iron and manganese concentration calculations.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00658.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

The Borough of Harvey Cedars Water Department in New Jersey devised a method of removing couplings from 4‐in., 6‐in., and 8‐in. asbestos cement pipe. Construction of the coupling puller is described.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00660.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

This article describes a fire extinguisher holder designed to prevent accidents such as an extinguisher falling from its mounting and injuring an operator. The holder also contains a display panel for standard instructions, and hangers for a wooden stick and a rope with wooden handles when safe rescue tools are needed in case of electrocution.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00662.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Solving for unknowns in mathematical equations is the topic of this portion of “Math for Operators.” Definitions of equations, knowns, and unknowns are given, and several examples of this procedure are included.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00664.x

出版商:Wiley    

年代:1980

数据来源: WILEY