X-masking registers are added in front of a compactor in test data compression environment to remove unknown values. The microporous zeolite can include zeolite Beta, zeolite Y, mordenite, Zeolite L, ZSM-5, ZSM-11, ZSM-12, ZSM-20, Theta-1, ZSM-23, ZSM-34, ZSM-35, ZSM-48, SSZ-32, PSH-3, MCM-22, MCM-49, MCM-56, ITQ-1, ITQ-2, ITQ-4, ITQ-21, SAPO-5, SAPO-11, SAPO-37, Breck-6, ALPO4-5, etc. An image forming method using the toner and an image forming apparatus employing the toner are also provided. Further, the bag insert forms a hollow rectangular tube such that waste can be placed inside the bag by dropping the waste through the open top of the bag insert. The ring element is composed of at least two flat material ring segments joined to one another successively in the circumferential direction, said segments being joined together in a manufacturing step which precedes the formation of the axial profiling. The cyclone separating apparatus includes a cyclone body including a cyclone chamber and a dust collecting chamber, a cover unit connected to an upper portion of the cyclone body, a door unit openably mounted to a bottom portion of the cyclone body, and at least one noise reducing rib formed in an air discharging pipe in the cyclone chamber.