Abstract: A tool device includes a number of tool members and enclosing members selectively attachable to either of two ends of a housing, a tool element slidably received in the housing and movable out through the enclosing member, and a moving device attached to the tool element for moving the tool element into and out of the housing or the enclosing member. A follower is slidably received in the housing and coupled to the tool element, and a knob is coupled to the follower for moving the follower and the tool element relative to the housing. A positioning device may position the tool element to the housing. An additional tool device may be selectively attached to the housing.

Abstract: A multifunctional instrument includes a plurality of holder units which are detachably mounted in series and connecting members which may be either mounted between and interconnecting two adjacent holder units or mounted to a distal end of interconnected holder units, each interconnecting member including engaging arrangement at two ends thereof for detachably engaging with two ends of the holder units, and different kinds of tool tips being formed on two ends of the interconnecting member.

Abstract: The present invention is related to a process of fuel oil hydrodesulfurization and hydrodenitrogenation, wherein cobalt-molybdenum catalysts are utilized, which are supported on a carrier of titanium-zirconium-molybdenum mixed oxides.

Abstract: The present invention is related to a process of fuel oil hydrodesulfurization and hydrodenitrogenation, wherein a cobalt-Molybdenum catalyst is prepared on a carrier of titanium-zirconium-vanadium mixed oxides, and the reaction is carried out in a fixed-bed reactor under reaction conditions. The present invention discloses the operating conditions of desulfurization and denitrogenation reactions, and the optimal compositions of said catalysts as well as its preparation method.

Abstract: The present invention relates to an improvement in a process for the conversion of benzene in gas-phase to cyclohexane under a suitable operation conditions by hydrogenation over a specific supported nickel catalyst located on a fixed bed reactor, the improvement comprising that the specific supported nickel catalyst is a nickel catalyst supported by a mixture of titanium dioxide and zirconium dioxide. The present invention also relates to the operation condition for the hydrogenation of benzene, the optimal components of the catalyst used, process for the preparation of said specific supported catalysts and the conditions for pretreatment.