1. Yu mas makim samting we yu laik autim:Ol kain kain midia i nidim ol paiplain pam we ol i wokim long ol kain kain samting bilong mekim ol i no inap bagarap na ol i ken senis.
2. Yu mas makim long soim longwe na mak bilong en:Ol dispela longwe na mak i save afektim het na pawa bilong pam.
3. Yu mas makim long 'flow rate' na presa:Yu mas makim stretpela 'flow rate' na 'pressure range' bihainim ol samting yu nidim tru.
4. Yu mas makim long pawa bilong mota:Pawa bilong mota i makim pawa na pawa bilong pam.