Abstract: According to one embodiment of the invention, there is provided a lead-free solder including an alloy rolled into a shape of sheet. The alloy includes: tin; from 10 wt % to less than 25 wt % of silver; and from 3 wt % to 5 wt % of copper. The alloy is free from lead.

Abstract: According to one embodiment of the invention, there is provided a lead-free solder including an alloy rolled into a shape of sheet. The alloy includes: tin; from 10 wt % to less than 25 wt % of silver; and from 3 wt % to 5 wt % of copper. The alloy is free from lead.

Abstract: According to one embodiment of the invention, there is provided a lead-free solder including an alloy rolled into a shape of sheet. The alloy includes: tin; from 10 wt % to less than 25 wt % of silver; and from 3 wt % to 5 wt % of copper. The alloy is free from lead.

Abstract: A construction unit adapted for constructing a retaining wall to keep a bank of earth from sliding or water from flooding, includes a plurality of U-shaped concrete panels having at least one drain, at least two I-shaped concrete panels each of which is connected to the rear end of one of the U-shaped panels, and at least one concrete shelf plate both ends of which are received by shelf receiving recesses formed in the inner surfaces of the U-shaped panels and the I-shaped panels. The U-shaped panels are vertically piled and further include a vertical engagement means to engage with the plurality of said vertically piled U-shaped panels, and connection members to connect to the I-shaped panels. This vertical engagement means includes an upper hole formed in the top surface of a lower panel of the vertically piled U-shaped panels and a lower hole formed in the bottom surface of an upper panel of the vertically piled U-shaped panels, and a steel bar installed in the upper and lower holes.

Abstract: The present invention relates to an electron beam adjusting device which is attached around the neck of a color picture tube, a CRT display, etc., and aims at providing an electron beam adjusting device in which each pair of constituent magnets can be readily magnetized with minimal magnetization variations and which is less costly. The present invention provides an electron beam adjusting device having pairs of two-, four- and six-pole ring-shaped magnets formed of an alnico metal system bonded magnet material, which are attached around the neck of a cathode-ray tube, wherein the two-pole ring-shaped magnets and the four- and six-pole ring-shaped magnets are made of respective bonded magnet materials which are different in the alnico metal magnetic powder content.

Abstract: An electron beam adjusting device used in a cathode-ray tube (CRT) of a television receiver, a display, etc., which is improved in the adjusting accuracy, reduced in the overall size and thickness, and also improved in the degree of freedom with which it is attached to the neck of a CRT. The electron beam adjusting device has pairs of two-, four- and six-pole ring magnets, which are attached around the neck of a cathode-ray tube used in a television receiver, a display, etc. The two-pole magnets, which are required to have a relatively high level of magnetic force, and the four- and six-pole ring magnets, which are not required to have a high level of magnetic force, are different in thickness from each other.