Talosaga:
GB / T, FZ / T, ISO, Astm.
O mea faigaluega:
1. Valivali paʻi le ata faʻaali ma faʻatonutonu, uʻamea ki i le faʻatonutonuina e tutusa.
2. Faʻaulufaleina tautua tautua ma le afi (vector pulea), afi tali taimi e puʻupuʻu, leai se saoasaoa
5. Faatulagaina ma le maualuga o le saʻo lensor