standard:101948 | |||
standard:101948 | |||
standard:101948 | |||
standard:101948 | |||
standard:101948 | |||
standard:101948 | |||
standard:101948 | embedded layer | ||
standard:101948 | inner layer | ||
standard:101948 | joint line | ||
standard:101948 | multilayer M pipe | ||
standard:101948 | multilayer pipe | ||
standard:101948 | outer layer |