Ko nga mekameka 20A-1/20B-1 he momo mekameka roera, he rereke te nuinga o nga waahanga paku.I roto ia ratou, ko te piro ingoa o te mekameka 20A-1 he 25.4 mm, ko te diameter o te rakau he 7.95 mm, ko te whanui o roto he 7.92 mm, ko te whanui o waho he 15.88 mm;i te wa ko te tohu ingoa ...
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