1. ອີງຕາມມາດຕະຖານອຸດສາຫະກໍາກົນຈັກ, ປະເພດ flange ແມ່ນ: ປະເພດແຜ່ນແປນ-welded flange, butt-welded flange, integral flange, butt-welded ring-plate type loose sleeve flange, flat-welded ring-plate type loose sleeve flange , flanged ring-plate type loose sleeve flange, flange cover. 2...
ອ່ານເພີ່ມເຕີມ