1. Cov ncej ntxig ntawm 10 hli mus rau 50 hli;
2. Ncua ntev mus txog 6000 hli;
3. Kev tu me nyuam nce mus txog 0.457 m / s;
4.Txoj khoom siv muaj txhuas, thiab npas kab;
5. Cov khoom siv tau muaj xws li chrome plated C45 steel, thiab chrome plated GCr15 steel;
6. Qib khoom muaj xws li:
(1) Chrome plated hlau ncej
(2) Aluminium alloy txhawb kev tsheb nqaj hlau