Abstract: A brushless motor comprises a rotor which is rotatable on an axis of the brushless motor and which include permanent magnets arranged circumferentially thereon, an output member connected to the rotor to rotate with the rotor, and a stator which includes electro-magnetic coils energized in order to rotate the rotor, and has a first space which receives the output member therein and a second space which extends from the first space to the outside of the stator so that an output power of the brushless motor is transmitted from the output member to the outside of the brushless motor through the second space.

Abstract: A method of reusing a slurry in a ground improving method, wherein a hardening agent is injected into the ground, and wherein the muddy water (i.e., the slurry which is discharged) upon working is regenerated and again used as an injection material; namely, a hardening agent. By measuring the physical amount indicative of the permeability characteristic of the hardening agent contained in the slurry, an amount of hardening agent contained in the collected slurry (i.e., an amount of hardening agent to be collected) is calculated. Since the amount of collected hardening agent is calculated simultaneously with the collection of the slurry, the amount of hardening agent to be newly injected can be controlled in a real-time manner on the basis of the latest data (i.e., numerical value).

Abstract: A moisture permeable protector such as gloves, fingerstalls, etc. for protecting hands and fingers at workshop, etc. utilizing a polyurethane film which has excellent moisture permeability. The film is made of polyurethane polymer having a polyoxyethylene content of 15-62% in a polyesterpolyol having a molecular weight of 3000 or less. The moisture permeability (g/m.sup.2,24 hours) of the film is 1500 or higher per 45 micron thickness, and the water absorption swelling ratio is 30% or less.