This paper introduces several common working principles of soft start,analyzes in detail the advantages and disadvantages in practical operation and provides their comparison in price and various distinctive performance.

Based on this definition,it introduces basic components of groundwater reservoir and their functions,advantages and disadvantages of the reservoir as well as its developing trend.

This paper elaborates several methods of manipulating AutoCAD Engineering Illustration in the Word document and their disadvantage, in order to be referenced by the Journal s redactors and the disquisition writers and improve their work efficiency.

However,it has some disadvantages.

Convection heating radiators were compared with the traditional heating ways,the advantages of the low-temperature hot water heating methods were analyzed as well as the disadvantages.

Based on the practice, analysis is made on the defects of TKPE 14.

Based on the research producing aspects fiber reinforced concrete,the merits and defects of fiber reinforced concrete were summarized.

In view of the serious problem of bicycle traffic in Tianjin urban district, some issues such as the superiority of bicycle traffic, its defects, the chief matter of being mixed with motor traffic, development prospects and proposals for improving bicycle traffic in Tianjin urban district are discussed.

The essay will focus on the four catalogues of euphemism in daily communication,oldness,death,shortcomings,and body function.

Analysis on Merits and Defects of Bay Window;