有誰自己拆過一級頭？ - 潛水運動討論

PADI休閒潛水大百科
p.3-60

Pistion first stages usually have fewer moving parts
than diaphragm first stages. This sometimes makes
them faster and easier to overhual.

同一個box的最後一段卻說

qualified individuals can adjust diaphragm first
stages in the field relatively wasily and with few tools.
Many(but not all)piston first stages have to be entirely
disassembled to adjust.

這兩段的敘述看起來是矛盾的

到底活塞式的比較好維護還是隔膜式的？

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