Reverse osmosis (RO) was invented and researched since the 50s and fully developed in the 70s of the 20th century.
ການຊຶມໄຫຼຄືນ (reverse osmosis - RO) ໄດ້ປະດິດແຕ່ງແລະ ຄົ້ນຄ້ວາຕັ້ງແຕ່ບັນດາປີ50ແລະ ພັດທະນາໄດ້ສົມບູນແຕ່ບັນດາປີ70ຂອງສະຕະວັດ20.