Improved resin-bonded powdered metal components are protected against corrosion and reduction of crush strength during contact with corrosive fluids such as alcohols, ethanol-containing fuels, glycols and peroxide-containing fuels by a resin system coating that, when cured, provides a relatively high crosslink density and relatively few hydrolysable radicals. The flexible wrap includes primary flaps and at least one reinforcement flap. The relay station may receive data sent by the base station based on the first CQI and may resend the data to the subscriber station based on the second CQI. Whether the track guided vehicle runs straight or shifts to a branch line can be controlled by contacting one of the branching rollers 22, 23 with the outer surface of the corresponding guide tracks 56, 56, which guide the guide rollers 20, 21 in the section different from the branching portion 51. This minimizes an adverse effect of crosstalk jitter over a transmission line susceptible to crosstalk, and reduces a margin between the transition and sampling point of a signal, thereby suppressing the cost of a CDR circuit. 14, a storage modulus ranging from 1.