"Thermoelectricity can produce electric energy from a difference in temperature. There has to be a temperaturegap in a conductor or semi-conductor material".
温差电能从不同的温度制造电能，必须是导体或半导体物质中的温差。
2
Because the waterproof apron will be affected by temperaturegap and accelerating aging and cause water table appeared in water and heat bilges cold shrink, serious will make parts damage.
A small gap that can form between the casing or liner and the surrounding cement sheath, most commonly formed by variations in temperature or pressure during or after the cementing process.