Series 550 yɛ ahobammɔ a ɛka bom a ɛda adi sɛ ɛyɛ mmerɛw sɛ wobɛhyehyɛ a ɛyɛ adwuma koraa. Wɔyɛ nketewa, ɛyɛ ketewaa koraa na ɛma nsu no kɔ soro sen nsusuwii ahorow a wɔde toto ho. I t yɛ nsa baako a wɔde di dwuma wɔ ahobanbɔ coupling a vents ansa na wɔatwa mu, yi asiane a ɛwɔ hose whip no fi hɔ.Series 550 yɛ ahobanbɔ coupling a ɛda adi sɛ ɛyɛ mmerɛw sɛ wobɛ grip nhyehyɛe a ɛyɛ adwuma koraa. Wɔyɛ nketewa, ɛyɛ ketewaa koraa na ɛma nsu no kɔ soro sen nsusuwii ahorow a wɔde toto ho. Ɛyɛ ahobammɔ a wɔde di dwuma a nsa biako na ɛyɛ adwuma a ɛma mframa kɔ ansa na wɔatwa mu, na eyi hose mpire ho asiane no fi hɔ.