Sarkar 20A-1/20B-1 duka nau'in sarkar abin nadi ne, kuma sun bambanta da yawa a cikin nau'i daban-daban.Daga cikin su, da maras muhimmanci farar sarkar 20A-1 ne 25.4 mm, diamita na shaft ne 7.95 mm, ciki nisa - 7.92 mm, da kuma m nisa - 15.88 mm;yayin da na'urar tantancewa...
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