The inner bag of the dust collector, which normally works for 8 hours every day, is usually replaced every 2-3 years.
ກະເປົາພາຍໃນຂອງເຄື່ອງເກັບຂີ້ຝຸ່ນ, ເຊິ່ງ ທໍາ ມະດາເຮັດວຽກ 8 ຊົ່ວໂມງທຸກໆມື້, ມັກຈະຖືກປ່ຽນແທນທຸກໆ 2-3 ປີ.