Phi-sú-tóng (Ji̍t-gí: ピストン; Eng-gí: piston) sī chi̍t khoán ki-hâi pō͘-kiāⁿ, chhái-ēng tī óng-ho̍k-sek iân-jín (reciprocating engine), óng-ho̍k-sek phòng-phuh (reciprocating pump) téng ki-hâi lāi-bīn. Phi-sú-tóng sī oa̍h-tāng ê pō͘-kiāⁿ, long tām si-lín-tah (cylinder) lāi-bīn, tàu chiūⁿ phi-sú-tóng lín-guh (piston ring) hō͘ i ē-tàng ū khì-ba̍t (gas-tight, chó͘-tòng khì-thé siā-lāu) ê chok-iōng.

Phi-sú-tóng

Iân-jín

siu-kái

Nā phi-sú-tóng tī iân-jín lāi-bīn ê lō͘-ēng, sī chiong si-lín-tah lāi-bīn ê khong-khì khok-tiong la̍t keng-kòe chi̍t ki phi-sú-tóng lò͘-toh (piston rod), he̍k-chiá koh keng-kòe khong-lò͘-toh (connecting rod), choan kòe khu-lán-kuh (crankshaft)

Liân-kiat

siu-kái