(9) Zanglamaydigan po'lat, karbonli po'lat, galvanizli qatlam, alyuminiy, mis uchun payvandlash ...
(10) Murakkab tikuvlarni va turli xil asboblarni payvandlash uchun javob beradi: Qo'shtirnoq bilan payvandlash, O'z-o'zidan payvandlash, Chok bilan payvandlash, Tirnoqlarni payvandlash, Siqish payvandlash, T-payvand, stack Lap payvandlash, Qo'shish chetini payvandlash