Ukunwetshwa kokuhlanganiswa nemicu yangaphakathi nangaphandle, ithusi le-1PT / 2pt / 3pt. I-1PT ukuhlanganisa ukuhlanganisa ngemicu yangaphakathi nangaphandle 50/75 / 100/205/205 / 150mm, i-2pt coupling ngentambo yangaphakathi nangaphandle 50 / 75/10mm, i-3pt ukuhlanganisa imicu enezintambo zangaphakathi ezingama-50/75 / I-100/125 / 150mm.
