Abstract: A vibratory compaction working machine has a lower travel structure and an upper swing structure mounted on the lower travel structure. The upper swing structure has a boom mounted thereon for pivotal movement by a first hydraulic cylinder, an arm mounted on the boom at its forward end for pivotal movement by a second hydraulic cylinder, and vibratory plate compactor mounted on the arm at its forward end for pivotal movement by a third hydraulic cylinder. The arm is in the form of an extension arm having a first arm element and a second arm element mounted for linear movement relative to the first arm element by a fourth hydraulic cylinder. The first arm element is attached at the forward end of the boom for pivotal movement by the second hydraulic cylinder, and the second arm element has the vibratory plate compactor attached to the forward end thereof for pivotal movement by the third hydraulic cylinder.

Abstract: A drying cylinder for use in the drying part of a paper making process. The moisture profile of paper web is equalized all over the width of said paper web by fixedly winding synthetic fabric around the surface of a drying cylinder contacting with wet paper web at the appointed positions thereof to form the void areas among yarns of said synthetic fabric as highly insulating air-holding portions.

Abstract: An alkaline storage battery which comprises a nickel positive electrode, a zinc negative electrode, a separator which wraps the negative an electrode and comprises from inside to outside in sequence: non-woven cellulose disposed on the negative electrode, a semipermeable membrane of cellulose and micro-porous plastic film which is in contact with the positive electrode, an electrolyte consisting of aqueous solution of KOH which is held on the positive and negative electrodes and in the separator and is controlled in an amount such that free electrolyte does not exist in places other than at the three elements mentioned above, and a gas phase reaction catalyst which is provided in a space in the storage battery to promote the reaction between oxide and hydrogen evolved at the end of charging.