Hou, ʻO nā ʻōmole ea hou ʻole he ipu ʻōmole, he mea hana piston plastik i loko o ka diaphragm i loko o ke kino, a me ke poo pamu ma ka waha o ka omole. Ke hoʻohaʻahaʻa ʻia ka pamu, piʻi ka piston i luna i loko o ka diaphragm.
Hoʻopiha ke kaomi i ka lua hakahaka a laila hoʻokaʻawale i nā mea i ʻike like ʻole. Ke hoʻohana nei kāu mea kūʻai aku i nā mea liʻiliʻi, ʻo ka pololei i hāʻawi ʻia e nā pamu ea ʻole he mea nui loa, ʻoi aku ka nui o nā huahana lapaʻau e koi ana i kahi kiʻekiʻe o ka pololei.
