In one aspect, there is provided a process for manufacturing a lower mold for receiving a falling molten glass droplet, in which without narrowing the option for material for a lower mold, any occurrence of air retention can be favorably prevented and a lower mold excelling in durability can be obtained. The ridged and grooved portions comprise grooves, which are disposed on the outer periphery near the tip having a blade face, and ridges, which are arranged on both sides of the grooves. The initiate boot command may include a base command and a unique argument indicative of a desire to enter the boot mode of operation. A second cap is integral with the plug shaft. The electrical pulses induce temporary formation of pores in the cell membrane and the substance enters the cell through the pores by passive diffusion or by active electrophoretic motion. The surface mount type crystal oscillator is such that a crystal piece and an IC chip are housed within a container main body having a bottom wall and frame wall formed with laminated ceramics, and a communication terminal is provided on an outer side surface of the container main body.