One thing I learned is the term "NOS" which means "New Old Stock" which means that it is in new condition but has sat on the shelf for many years.
ສິ່ງ ຫນຶ່ງ ທີ່ຂ້າພະເຈົ້າໄດ້ຮຽນຮູ້ແມ່ນ ຄໍາ ວ່າ" NOS" ເຊິ່ງມີຄວາມ ຫມາຍ ວ່າ" New Old Stock" ເຊິ່ງ ຫມາຍ ຄວາມວ່າມັນຢູ່ໃນສະພາບ ໃຫມ່ ແຕ່ໄດ້ນັ່ງຢູ່ເທິງຕັ່ງເປັນເວລາຫຼາຍປີແລ້ວ.