Lub flange yog ib qho sab nraud lossis sab hauv, lossis ntug (duab), rau lub zog, raws li lub flange ntawm cov nqaj hlau xws li I-beam lossis T-beam; los yog rau kev txuas mus rau lwm yam khoom, raws li lub flange ntawm qhov kawg ntawm cov yeeb nkab, chav cylinder, thiab lwm yam, los yog ntawm lub lens mount ntawm lub koob yees duab; los yog rau flange ntawm lub tsheb ciav hlau los yog tra...
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