PH, PJ, PK, PL, PM
Lub ntsiab lus ntawm multi wedge siv
Piv txwv li:
1) Qhov Loj: 10pj1089
Npog tus lej (peak tooj): 10
Siv tau ntev (section): 1089mm
2) English system: 10pj250
Npog tus lej (peak tooj): 10
Siv tau ntev (section perimeter): 25 25.4=635mm
