Kwan pa dwong pa yamu ma kadho kud i yore mi yweyo
F - Air duct cross-sectional shape. Rectangular nyo round.
D - Lat pa pii.
X - Lat pa duct ma nen calu rectangular.
Y - Bor pa duct ma nen calu rectangular.
E - Ngwec pa yamu, pi sekond acel.
Ker pa program.
Kwan pa dwong pa yamu ma kadho kud i yore mi yweyo.