Piv nrog rau plaub-groove log tsheb, peb-groove log muaj ib tug tsawg zawj. Yog li ntawd, qhov tshwm sim ntawm kev rhuav tshem cov roj hmab thaiv nrog cov pob zeb me me yog qhov tsawg, thiab nws hnav-tiv taus ntau dua li plaub-groove log nyob rau hauv tib lub sijhawm.
Piv nrog rau peb grooves, plaub grooves muaj ib tug ntxiv zawj ntawm lub log log, thiab ib tug zawj tsawg dua roj hmab, yog li cov dov kuj yog qis dua thiab ntau roj-npaum. Yog li ntawd, nyob rau hauv ib lo lus, nyob rau hauv tib yam kev mob, ( tib lub tsheb tej yam kev mob, tib txoj kev, tib lub load, tib lub log tsheb siab, tib neeg tsav tsheb tus cwj pwm, tib lub log tsheb, technology, thiab qhov hnyav) "peb grooves yog ntau hnav-resistant, thiab plaub grooves yog ntau hnav-resistant, ditch yog ntau roj npaum. "
