Below the floor's five layers of glass (protected from scratches by the booties) can be seen the cracked, sharp-edged rock face of the canyon's rim and a drop of thousands of feet to the chasm below.
The side of the ship was entirely covered with three to five layers of armor plates, of which the three innermost plates extended 42 inches below the waterline.
They are made of one layer of "face tile" -- that is, the cream-colored tile visible from below -- and four layers of backing tile.
Below this are two layers of muscles, which develop from the lining of the coelom (body cavity): circular muscles make a segment longer and slimmer when they contract, while under them are longitudinal muscles, usually four distinct strips, whose contractions make the segment shorter and fatter.
The structure consists of a large bag of water with a blackened bottom, foam insulation below the bag, and two layers of plastic or glass glazing on top of the bag; the design allows convection but prevents evaporation.
The water was below freezing, and my three layers of socks became soaked in 30 seconds.
Mattel also moved to enforce a rule that subcontractors cannot hire two and three layers of suppliers below them.
Dyes that make up images in traditional prints are suspended in three layers of gelatin, well below the surface.
Sounds coming from the front, rear, right, left, above and below can be reproduced in detail by three layers of speakers, with nine channels on top, ten in the middle and three at the bottom, as well as a two-channel LFE (Low Frequency Effects) speaker….
In this and all similar cases described below the plates were tightly sealed with four layers of parafilm to prevent leakage of volatiles and incubated at 28°C.
