

There are a lot of ways to strand a conductor (c.f. ASTM B 354). The common ones
are called unilay, concentric lay, semi-concentriclay, rope-lay and bunched (this is
avoided most of the time due to its irregular surface).
这句话的意思是:
导体有许多的绞合。通常有单层绞,同心层绞,不规则同心层绞,扭绞式绞和束绞几种(束绞大多数是为避免导体表面不规则而采用的方法)

