Abstract: This invention relates to a coating film remover composition comprising water, benzyl alcohol, and at least one kind of cellulose derivative, the coating film remover composition having a pH in the range of 5 to 9.

Abstract: An IC socket has a socket board having a plurality of contacts for contacting IC leads, and IC accommodating portion formed in a central portion thereof, and an IC supporting platform adapted to support an IC package thereon and disposed in the accommodating portion so as to be movable in an upward and downward direction. The contacts are formed in parallel along opposing sides of the supporting platform. A plurality of grooves for positioning the contacts are formed in parallel in opposing sides of the IC supporting platform. Contacting portions of resilient contacting pieces of the contacts are received in the positioning grooves. The resilient contacting pieces are regulated by partition walls defining the positioning grooves. The IC socket is characterized in that among the partition wall groups formed on four sides, one portion of partition wall groups of at least two opposite sides are interconnected at free ends of the partition walls.

Abstract: A data retransmitting system in which data is transmitted in data frames having a predetermined length and an answer signal is transmitted back from the signal receiving side upon reception of each data frame. A measuring frame is transmitted from the signal transmitting side prior to the start of data transmission. A transmission delay time is measured from a time difference between transmission of the measuring frame and reception of an answer signal to said measuring frame from the signal receiving side according to the transmission delay time, a frame length for each data frame and a monitoring time which elapses the time instant that each frame has been transmitted until the corresponding answer signal is detected. When, with respect to each data frame having the frame length thus determined, no answer signal is detected within said monitoring time thus determined the data is retransmitted.