Cov niam yuav zaum pom zoo tias cov tsev kawm ntawv ploj ntawm Schoolgirls lwm qhov chaw.
Yog li no, hnub no kuv yuav qhia koj kom nws tuav cov pos hniav rau cov plaub hau los ntawm cov nqaij mos.
Txiav cov ntaub npuag txog 30 centimeters thiab 5 centimeters dav.
Qhov dav thiab ntev tuaj yeem hloov pauv raws li cov pos hniav uas koj xav tau tsawg dua lossis volumetric. Quav cov npuag ob zaug thiab xaws nws ntawm ntug dawb.
Nws yog ib qho tsim nyog los xaws kom li. Yog li ntawd cov leeg nyob hauv nruab nrab, uas yog, hla nws ntawm qhov tsis ncaj ncees lawm, thiab tom qab ntawd tshem tawm sab pem hauv ntej.
Hauv nruab nrab, ncab lub pob sand elastic 10 centimeters.
SUSTRATE cov pos hniav thiab ntaub.