Download or read book JB T 9023 2 1999 Translated English of Chinese Standard JB T 9023 2 1999 JBT9023 2 1999 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-10-25 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This standard specifies the type, basic parameters, technical requirements, safety requirements, test methods, inspection rules, marking, packaging, transportation and storage of KQJ downhole drills. This standard applies to non-self-propelled downhole drills (hereinafter referred to as drills).

Download or read book JB T 9023 1 2019 Translated English of Chinese Standard JB T 9023 1 2019 JBT9023 1 2019 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2024-10-04 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Part of JB/T 9023 specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of downhole drills for open-cut type. This Part is applicable to downhole drills (hereinafter referred to as drills) used for drilling blasting holes in open-pit projects such as open-pit mining, water conservancy construction, railway and national defense construction.