Ua ib qho tseem ceeb ntawm cov khoom siv sib txuas, 660 flange bolts ua lub luag haujlwm tseem ceeb hauv kev lag luam, kev tsim kho thiab lwm yam kev ua haujlwm engineering. Txhawm rau kom ntseeg tau tias nws cov kev ua tau zoo thiab kev nyab xeeb, nws yog qhov tsim nyog los siv kev tswj hwm lub neej voj voog (kev tswj hwm lub neej voj voog). Tsab xov xwm no yuav qhia txog cov theem tsim khoom, daim ntawv thov thiab kev saib xyuas ntawm 660 flange bolts, tsom mus rau yuav ua li cas tswj hwm txhua qhov txuas kom zoo dua qub kev ntseeg siab thiab kev siv nyiaj ntawm cov khoom.