#self-drillinganchorboltUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesNewcomers' CommunitySteemitCryptoAcademySteemit Feedbackআমার বাংলা ব্লগKorea • 한국 • KR • KOSteem AllianceSTEEM CN/中文AVLE 일상Steem POD TeamTron Fan ClubBeauty of CreativitySteem Space#self-drillinganchorboltTrendingHotNewPayoutsMutedsinorock (30)in #self-drillinganchorbolt • 4 years agoSelf-drilling hollow anchor bar V.S. mortar barAnchor bolt supporting technique can give full play to the self-stabilizing ability of the surrounding rock, and is…