Abstract: Provided is a cold-rolled steel sheet consisting of carbon (C): 0.23 wt % to 0.35 wt %, silicon (Si): 0.05 wt % to 0.5 wt %, manganese (Mn): 0.3 wt % to 2.3 wt %, phosphorus (P): more than 0 wt % and not more than 0.02 wt %, sulfur (S): more than 0 wt % and not more than 0.005 wt %, aluminum (Al): 0.01 wt % to 0.05 wt %, chromium (Cr): more than 0 wt % and not more than 0.8 wt %, molybdenum (Mo): more than 0 wt % and not more than 0.4 wt %, titanium (Ti): 0.01 wt % to 0.1 wt %, boron (B): 0.001 wt % to 0.005 wt %, a balance of iron (Fe), and unavoidable impurities, wherein a final microstructure of the cold-rolled steel sheet includes cementite, a transition carbide, and a fine precipitate, the transition carbide including ?-carbide having an atomic ratio of a substitutional element selected from Fe, Mn, Cr, and Mo, to C of 2.

Abstract: Provided is an ultra-high strength cold-rolled steel sheet, including: carbon (C): 0.23% to 0.40%; silicon (Si): 0.05% to 1.0%; manganese (Mn): 0.5% to 3.0%; vanadium (V): 0.01% to 0.12%; aluminum (Al): 0.01% to 0.3%; chromium (Cr): greater than 0% and 0.5% or less; titanium (Ti): greater than 0% and 0.1% or less; phosphorus (P): greater than 0% and 0.02% or less; sulfur(S): greater than 0% and 0.01% or less; and boron (B): 0.001% to 0.005%, based on % by weight; and a remainder being Fe and other unavoidable impurities, wherein a final microstructure includes tempered martensite having a volume fraction of 90% or more, wherein an average spacing between precipitates in the tempered martensite is 300 nm or more, an average size of the precipitates is 200 nm or less, and the number of precipitates having an average size of 40 nm or less is 25 or more based on an area of 20 ?m2 in the final microstructure.

Abstract: There is provided a flow-blocking safety valve to prevent an explosion of a portable gas container, wherein, when the portable gas container overheats during use and the temperature rises above a predetermined level, a bridge hold supporting a pin of the safety valve melts and thus a pin or ball securely supported in the bridge holder becomes free to move to close a flow channel through which the gas flows, thereby blocking the gas discharge and preventing an accident occurring when the gas container bursts by overheating.

Abstract: There is provided a flow-blocking safety valve to prevent an explosion of a portable gas container, wherein, when the portable gas container overheats during use and the temperature rises above a predetermined level, a bridge hold supporting a pin of the safety valve melts and thus a pin or ball securely supported in the bridge holder becomes free to move to close a flow channel through which the gas flows, thereby blocking the gas discharge and preventing an accident occurring when the gas container bursts by overheating.

Abstract: The present invention relates generally to a cap for a gas vessel that has a separable gas exhaust unit. The gas exhaust unit may be integrally formed in the upper surface of the vessel cap so as to be separably attached by ribs. The gas exhaust unit may also be formed to be coupled to a mounting cup while pressing a valve stem of the gas vessel. The cap for a gas vessel having a separable gas exhaust unit may also include one or more gas injection adaptors integrally formed in the edge of the vessel cap so as to be separated by ribs. According to the present invention, the gas exhaust unit can be separated from the cap or a mounting cup of the vessel for its use when necessary.

Abstract: The present invention relates generally to a cap for a gas vessel that has a separable gas exhaust unit. The gas exhaust unit may be integrally formed in the upper surface of the vessel cap so as to be separably attached by ribs. The gas exhaust unit may also be formed to be coupled to a mounting cup while pressing a valve stem of the gas vessel. The cap for a gas vessel having a separable gas exhaust unit may also include one or more gas injection adaptors integrally formed in the edge of the vessel cap so as to be separated by ribs. According to the present invention, the gas exhaust unit can be separated from the cap or a mounting cup of the vessel for its use when necessary.

Abstract: There is provided a safety valve to release excess pressure from a portable gas container for the prevention of an explosion, wherein, when the internal pressure of a portable butane gas container increases over certain level, the safety valve instantaneously operates to release the excess pressure gas from the container at once through an excess pressure gas outlet, thereby sufficiently lowering the pressure inside the container to prevent the container from exploding.

Abstract: There is provided a safety valve to release excess pressure from a portable gas container for the prevention of an explosion, wherein, when the internal pressure of a portable butane gas container increases over certain level, the safety valve instantaneously operates to release the excess pressure gas from the container at once through an excess pressure gas outlet, thereby sufficiently lowering the pressure inside the container to prevent the container from exploding The safety valve comprises: a safety valve housing with first and second diameter portions integrally formed in a cylindrical shape, the first and second diameter portions being different from each other in diameter; a shaft with a body, a top projection formed on a top of the body, a gas outflow portion and a gasket locking portion formed at a lower part of the body, the shaft positioned inside the safety valve housing; a stopper with a lower part being open, an upper part being closed except for a center where a through-hole is vertically for

Abstract: A spout cap having a two steps type straw part comprises a coupling part fixedly coupling with the pouring hole of the metal container; a first straw part extending at a predetermined length on the interior face of the coupling part; a cap coupling part having a pouring outlet through which contents in the metal container flow out, wherein the cap coupling part is selectively positioned in an overlapped disposition or an unfolded disposition with respect to the first straw part; an extension part between the first straw part and the cap coupling part, wherein the extension part is capable of extending the unfolded length when the cap coupling part is unfolded with respect to the first straw part; a second straw part extended from the upper inner face of the extension member at a predetermined length and coupled with the lower end of the cap coupling part.

Abstract: This invention discloses a spout cap having a two steps type straw part to easily pour contents in a metal container in the desired place.