qauv:
AX,BX,CX,XPZ,3VX,XPA,XPB,5VX,XPC
yam ntxwv:
Qhov tshwj xeeb ncaj ntug qauv, kev siv ntau ntawm cov fibers luv luv, kev siv cov canvas nrog cov txheej txheem tshwj xeeb, kev siv cov txheej txheem thim rov qab, thiab lub kaum sab xis ntawm cov txheej txheem sib tsoo.
Pom zoo ua haujlwm kub:
-18 ~ 70 degree .
