Daim duab peb sab koob
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Tuam Tshoj tus Loj tshaj plaws Chaw tsim tshuaj paus ntawm Triangular Felting Needles
Daim duab peb sab koob yog hom siv ntau tshaj plaws thiab muaj qhov ua haujlwm hla ntu ntawm daim duab peb sab isosceles uas tuaj yeem tiv taus txhua qhov kev qhia ntawm longitude, yog li cov txiaj ntsig zoo tuaj yeem ua tiav thaum lub sijhawm tho.
Kev xaiv ntau yam
• Koob loj: 18, 20, 23, 25, 32, 36, 38, 40, 42
• Koob ntev: 3 "3.5" 4 "4.5" 4.8 "6"
• Barb puab: GBFL GB LB
• Lwm cov duab ntawm qhov chaw ua haujlwm, tshuab naj npawb, barb zoo thiab rab koob ntev tuaj yeem kho tau