This study is to develop a ring binder which deals with punching process and ring pressing process consecutively for twin ring binding. The purpose of this study is to develop a vertical ring binder which operates punching and binding process in unification by using a power source. It is expected to reduce the personnel expenses more than 40% by uniting the two ring binding processes, which are imported products, into this trial manufacture. It is also expected to decrease the diversion of foreign currency by substituting imported electric ring binder, which costs almost 10 billion won in a year, to this binder.

In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated for an indirect injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenate additive blended fuel which has four kinds of mixed ratio. Ethylene glycol mono butyl ether(EGBE) contains oxygen component 27% in itself, and it is a kind of effective oxygenated fuel of mono-ether group that the smoke emission of EGBE is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads in a IDI diesel engine.