Carpets, and other floor surfaces, should be shampooed and vacuumed regularly to prevent fleas. The cylinders may be cleaned by purging with high purity nitrogen, the vacuumed. Fabric ducting can be washed or vacuumed using typical household appliances. Linings and backing should also be removed, vacuumed, and washed separately. After the mortar has been cut out, the joints are vacuumed or brushed clean. Furniture and other susceptible objects should be vacuumed to remove hairs and loose fibers. It produces much dust that has to be vacuumed. These adults can also be simply vacuumed or picked up and discarded. The vacuumed and sealed bags are automatically unloaded, which obviously is more convenient. The specimen should be vacuumed with a HEPA filter in a well-ventilated space. Ablative flashtubes need to be refilled and vacuumed to the proper pressure for each flash. The gases and vapors are vacuumed into a condensing unit. The cloth on a snooker table is not vacuumed, as this can destroy the nap. Textiles should be vacuumed before and after display. Usually, this method will not introduce any new bubbles into the vacuumed material.