A cue stick comprises a base shaft having improved warp resistance, a tip end piece having a high compressive and bend strength to weight ratio, and a sleeve having a high band strength to weight ratio. This device includes an extraction unit analyzing specifications of software to extract necessary modules, and a retrieval unit checking whether the modules are stored in our own device and for executing a retrieving process of the modules for another device connected through a network if the modules are not stored in our own device. Locking mechanisms may secure leg portions, a backrest portion, and a footrest portion of the chair in multiple positions relative to a seat of the chair. 6 nm, and 0 nm\u2266Wa2\u2212Wa1\u22660. The method and process may include injecting hot gas, which may be exhaust gas from a burner apparatus, into one or more desorption drums to lower heating costs. The method for data transmission includes: determining that data to be transmitted is control plane signaling related to a user equipment that camps on a relay node; and transmitting the data through a first user data bearer established between the relay node and a donor base station, where the first user data bearer provides integrity protection for the data.