An ion-implanting apparatus and method can dynamically control a beam current value with time and does not change energy. Compounds of general formula I are provided:or pharmaceutically acceptable salts thereof. The vessel barrel sections are dimensioned so as to nest within one another for compact storage. In another aspect, the source andor drain may consist partially or fully of a silicide. The active-substance-comprising bait layer furthermore comprises a superdisintegrant whose effect is that, upon the use of the product in an environment with high atmospheric humidity, the active-substance-comprising bait layer does not run. The pressure oil delivered from the third hydraulic pump 3, therefore, remains unaffected by variations in delivery flow rates from the first and second hydraulic pumps 1,2, in other words, by variations in their torque consumptions, so that the third hydraulic pump is assured to provide a stable flow rate.