Swivel packing seal assembly is the key of the swivel, whose function directly influences its service life, further more, and affects the drilling speed.

The wash pipe packing of drilling swivel showed wear-and-tear continually in drilling process due to its structural design.

The mean value of work loads on a shaft bearing of swivel and rotary table is determined by basic principles of fuzzy theory, considering the loads' fuzziness and the requirement for reliability.

Effects of Cast Iron and Chromeplate Tap on Over Night Tap Water Quality;

Human-computer interaction problem of tap was discussed from the two aspects: switch device design and flowing angle design.

A design method of the constant temperature faucet based on single chip computer is introduced.

Based on his many years of practical experience,the author pointed out that the appearance quality of faucet plumbing electroplating depends on the 4 aspects: material quality,polishing and grinding,pre-treatment and electroplating process.

The water cock is one of the most important composition parts on the drilling machine.

The design of the dual way water swivel is briefly described with the problems encountered in use and corresponding solution