Complex sentence: Usually, this process is used with graphite, but as tungsten has a high melting point (3420 0 C) this allows the CuW electrodes to have a longer service life than the graphite electrodes.
Split into simpler sentences: Usually, this process is used with graphite, but tungsten has a high melting point (3420 0 C). This allows the CuW electrodes to have a longer service life than the graphite electrodes.