1. Qhov kub ntawm cov phab ntsa tuab ntawm cov rwb thaiv tsev aluminium coil poob sai sai, ua rau lub zog shrinkage ua ntej, thaum qhov kub ntawm cov phab ntsa tuab los yog qhov hollow raj qhov poob qis, uas yuav luag tsis muaj zog shrinkage.
2. Thick walled cross-section nrog me me shrinkage quab yuam, los yog tshem tawm los ntawm kev tsav tsheb.
3. Lub insulated aluminium coil tawm ntawm lub tshuab unwinding, thiab qhov kub thiab txias dua.
4. Ib feem ntawm cov phab ntsa tuab los yog ib feem ntawm lub raj hollow muaj qhov sib tshuam loj heev, uas maj mam ua rau lub zog loj thaum qhov kub thiab txias. Txawm li cas los xij, qhov txo qis hauv qhov kub thiab txias hauv ib feem ntawm cov phab ntsa tuab yuav tsis ua rau lub zog contraction lossis ua rau lub zog me me.
5. Qhov sib txawv ntawm lub zog shrinkage ntawm aluminium coil yog qhov tsis sib xws, thiab cov rwb thaiv tsev aluminium coil khoov ntawm cov phab ntsa tuab lossis cov kav dej hollow raws cov kev taw qhia compression.
