Ntawm peb cov hnab looj tes uas niaj zaus, cov hnab looj tes insulating yog cov hnab looj tes tawv. Ntawm lawv, 12 kV roj hmab insulated hnab looj tes thiab 35 kV roj hmab insulated looj hnab looj tes. Ntawm lawv, roj hmab insulated looj hnab looj tes, lub Hoobkas ntsuas voltage yog 12000V. Nws yog tsuas yog siv los ua kev tiv thaiv kev nyab xeeb ntawm cov khoom siv hluav taws xob muaj zog siab dua 1000V. Siv los ua cov khoom siv kev nyab xeeb yooj yim ntawm cov khoom siv hluav taws xob muaj qis hluav taws xob qis dua 1000V.
Hais txog hnab looj tes tawv, cia wb mus saib nws cov txheej txheem ua tawv tsiaj. Hais txog cov tawv dej tsis huv, nws tuaj yeem raug kho nrog roj ntxhia lossis fluorinated ua kom tsis txhob nkag los. Cov kev kho no tuaj yeem txhim kho cov cuab yeej ntawm cov tawv tawv ua kom nws hnav tau ntau dua, thiab nce qhov kev nplij siab (muag muag) thiab kho cov hnab looj tes. (Tactile), thiab tuaj yeem txuas lub neej kev pab.
Raws li rau cov roj zoo li qub, nws yog kho nrog cov roj ntxhia hluavtaws lossis cov tshuaj fluorinated los tiv thaiv lub hauv dej thiab roj. Cov kev kho no tuaj yeem txhim kho cov khoom siv ntawm cov tawv, ua kom nws hnav tsis tau zoo, thiab nce qhov kev nplij siab (muag muag) thiab ncua ntev (kov) ntawm cov hnab looj tes, thiab tuaj yeem txuas lub neej. Qhov no tuaj yeem ua rau nws muaj dexterity zoo dua, tuaj yeem tswj cov mos tom qab siv hauv cov chaw oily thiab noo, ntev kev pab cuam lub neej, thiab txav tau zoo.