secondary barrier การใช้

• Troops would only unstaff a secondary barrier on the northern edge, the army said.
• In the San Diego area, the secondary barrier consists of concrete columns spaced a few inches apart.
• CL3 emphasizes additional primary and secondary barriers to minimize the release of infectious organisms into the immediate laboratory and the environment.
• Luckey would like to see another safety measure _ a Kevlar curtain that acts as a secondary barrier when the cockpit door is opened.
• For cargoes carried at temperatures between the ship's hull may act as the secondary barrier and in such cases it may be a boundary of the hold space.
• These doors are an upper extension of the collision bulkhead and act as a secondary barrier against water entering the car deck, should the primary bow door ( s ) fail.
• A party balloon also has a large surface to volume ratio so it will lose positive buoyancy faster than a airship ( which may also have a secondary barrier ) and its lift will not be as great.
• However, due to the nearby railroad tracks that pass by the bridge, the grade crossing before the bridge on the Capitol Mall side is designed to act as a secondary barrier to prevent vehicular traffic from entering the bridge while raising or lowering.