Hejian Deris Petroleum Drilling Equipment Co., Ltd. have been specialized in Tricone Bit manufacture for many years. Our main products are various kinds of Hole Opener, PDC Bit. Also including Roller Cone Bit, etc.
Keywords are search requests to search engines that people use to find some information. Keywords on a web page reflect what the page is about. Below are the keywords the site. Green line represents the frequency of keyword usage on the site.
Homepage links
Internal - 148
External - 5
Internal links from the site's home page define the general site's sections and serves as one of the most important factors of site ranking. External links tie the site with other sites and determines the site's theme. Relation of external links to internal links influences the distribution of the site's rank for search engines. It's desirable that the amount of internal links prevail.
