Abstract: A chemical analysis film cartridge having a box-like casing body with opposing first and second end walls and in which dry frameless chemical analysis film chips are stored in a stack between the end walls. A first opening is formed in a side wall of the casing body near the first end wall so that only the film chip nearest the first end wall can be removed from the casing body through the first opening. A second opening in the first end wall permits a suction pad to hold the film chip nearest to the first end wall and to take the film chip out of the casing body through the first opening. The width of the first opening is larger than the thickness of one film chip and smaller than double the thickness of one film chip.

Abstract: A chemical analysis film cartridge with a box-like casing body having first and second end walls opposed to each other between which a plurality of dry frameless chemical analysis film chips are stored in a stack. A first opening is formed in a side wall of the casing body near the first end wall so that only the film chip nearest the first end wall can be taken out of the casing body through the first opening by moving the film chip in a direction perpendicular to the stack. A second openings which permits a suction pad to hold the film chip nearest the first end wall and to remove it from the casing body through the first openings is formed in the first end wall. The width of the first opening is larger than the thickness of one film chip and smaller than double the thickness of one film chip over at least a portion of the first opening.

Abstract: A method for selectively separating 2,6-dichlorotoluene from a mixture of dichlorotoluene isomers by means of a zeolite adsorber, characterized in that a zeolite selected from the group consisting of ZSM-5 zeolite, ZSM-8 zeolite, ZSM-11 zeolite, ZSM-21 zeolite, ZSM-35 zeolite, Zeta-1 zeolite, Zeta-3 zeolite and TPZ-3 zeolite, is used as the adsorber to selectively separate 2,6-dichlorotoluene as a non-adsorbed component.

Abstract: Para-chlorotoluene is prepared selectively at high yield by nuclear chlorination of toluene, in the presence of a Lewis acid catalyst, and a co-catalyst comprising at least one compound selected from the group consisting of phenoxthine derivatives and highly chlorinated phenoxthine derivatives obtained by chlorinating said phenoxthine derivatives at higher degree, said phenoxthine derivatives being represented by the general formula of: ##STR1## wherein R represents methyl group or groups at the position-1 and/or position-3,m is zero or an integer of 1 or 2,X is hydrogen or chlorine atom, andY is chlorine atom or methyl group;and whereinm is an integer of 1 or 2 andX is hydrogen or chlorine atom when Y is chlorine atom,X is chlorine atom when Y is methyl group and m is zero, andX is hydrogen atom when Y is methyl group and m is an integer of 1 or 2.

Abstract: As a material for bit legs, cutters, bearings and ring seals in a bit for drilling igneous rock steel is used which consists essentially in weight % of:0.10 to 0.20 C;up to 0.5 Si;up to 1.0 Mn;3.0 to 5.0 Cr;0.8 to 2.0 Mo;0.10 to 0.70 V; andthe balance being Fe,and is used after its surface layer is hardened by a carburizing process.

Abstract: Hardened machined parts are manufactured from rolled or forged steel which consists essentially of 0.05 to 0.15 wt % of C, up to 0.50 wt % of Si, up to 1.5 wt % of Mn, 0.30 to 1.0 wt % of Cr, 0.50 to 1.0 wt % of Mo, one or more of elements selected from the group consisting of 0.10 to 0.40 wt % of V, 0.03 to 0.20 wt % of Ti, 0.03 to 0.20 wt % of Nb and 0.0005 to 0.0050 wt % of B, the balance being Fe, in the following steps: cooling the steel in air from 900.degree. C to 1,000.degree. C; machining the cooled steel; and subjecting the machined steel to a nitriding treatment at 500.degree. to 650.degree. C for 2 to 8 hours.