Whereas existing length adjustable gas spring is comprised of double cylinder structure that is made up of external cylinder and internal cylinder, length adjustable gas spring of this invention is made up of merely one cylinder. The lock has a substantially cylindrical housing having a top surface, a bottom surface, and a curved side surface. One embodiment for securing information on an IC includes entering a test mode and resetting each register in response to entering the test mode of operation and prior to receiving a test mode command. An appropriately programmed synchronous network traffic processor may replace modules traditionally implemented with hard-wired logic or ASIC. After this, a second ion-implantation process is performed solely on the predefined electrode part of the polysilicon layer so as to convert this part into a heavily-doped polysilicon layer with a second predefined impurity concentration higher than the first impurity concentration.