#self-drillinganchorboltUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesNewcomers' CommunitySteemitCryptoAcademySteemit Feedbackআমার বাংলা ব্লগSteem AllianceKorea • 한국 • KR • KOSTEEM CN/中文Beauty of CreativityTron Fan ClubAVLE 일상Comunidad LatinaSteem For Lifestyle#self-drillinganchorboltTrendingHotNewPayoutsMutedsinorock (30)in #self-drillinganchorbolt • 3 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…