Kala soocida qaabka qaab-dhismeedka ee sare ee piston
① piston top flat: ku haboon pre-guba qolka gubasho engine carburetor iyo qolka gubasho turbocurrent for naaftada engine.The faa'iido waa fududahay in la soo saaro, top orso qaybinta kulaylka uniform, iyo tayada piston yar.
② piston top concave: hagaajin karaa dareere isku dhafka ah iyo waxqabadka gubashada ee naaftada ama matoorada shidaalka qaar ka mid ah. The faa'iido waa fududahay in la beddelo saamiga cadaadis iyo qaabka qolka gubashada.
③ convex top piston: si loo hagaajiyo saamiga isku xidhka, guud ahaan ku haboon matoorada tamarta yar.

By qaab dhismeedka marada
① biistoonada goonnada: ku habboon matoorada leh dhexroor dhululubo yar yar iyo cadaadiska gaaska hooseeya.Ujeedada godadku waa in laga fogaado balaadhinta, sidoo kale loo yaqaan piston laastikada.
② goonnada bistoonka aan la daboolin: inta badan waxaa lagu isticmaalaa matoorada baabuurta waaweyn

Ku-soocidda biin biin ah
① biistoon halkaas oo dhidibka kursiga biinku uu kala gooyo dhidibka piston.
② dhidibka biinanka biinanka si siman dhidibka piston.