A compact, economical air bag fabric of low air permeability and light mass is realized by a thermoplastic fiber fabric having a distribution of pores formed by the fibers constructing the fabric, that is, the pore distribution of 2. The rust inhibitor is manufactured by admixing zinc and aluminum as fine powders of inorganic metals, which are manufactured with a stamping mill to have a flaky shape, to a modified silicone resin solution. Kits for preparing the hydrogels are also disclosed. The carriage has a space at the frontal portion for carrying passengers and a back portion at the rear portion. The difference between the inner diameter of the coupler housing and the outer diameter of the injection valve member is 0.