jack bolt 中文意思是什麼

jack bolt 解釋
調整螺旋
  • jack : n 1 〈常 J 〉 傑克〈男子名，也作 John 的俗稱或昵稱〉。2 〈J 〉普通人，男子，傢伙，小夥子。3 水手...
  • bolt : n 1 螺釘，螺栓。2 （門窗等的）插銷；閂，鎖簧。3 箭，矢；弩箭；【軍事】槍機，槍栓。4 電光，閃電。5...
  1. In this test, a special bolt - jack is used to exent of prestressing force to brace angles as the whole structure is under dead - load. in this state brace angles withstand partly load before twice - load and the stress and strain of concrete are decreased. in this way the aim of removal of load and strengthening can be reached

    本試驗中採用專用螺栓千斤頂在恆定荷載水平下對混凝土柱角鋼撐桿施加預壓應力，使外包角鋼在二次受力前即分擔部分荷載，使混凝土應力水平和應變水平降低，達到卸載與加固同步進行的目的。
  2. Products are : super high pressure electric, pneumatic, manual oil pump ; pre - stress jack for the use of coal mine and construction ; steel bar and cable scissor ; all kinds of bolt for safety supporting and bolting ( km19 and km22 bolt have all got the certificate of “ ma ” in china. ) ; cable anchor and bolt test stand ; hydraulic nut scissor and etc

    產品有防爆式超高壓電動、風動、手動油泵；煤礦、建築用預應力張拉千斤頂；鋼筋、鋼絞線切斷器；安全支護用各種錨具（ km19 、 km22錨具在國內率先取得煤安證書） ；錨索錨具靜載拉伸試驗臺；液壓螺母破切器等。
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