Explanation for -1):
For an example of (2) mirror-imaged fabrics see Fig. -5(f).
These fabrics are mirror-imaged because
all the "corresponding crossings" are mirror-imaged.
(A typical group of corresponding crossings
has been designated by the marker-circles.)
The crossings in that group are mirror-imaged because
in one crossing
the "a"-element crosses over the "b"-element
&
in the other crossing
the "a"-element crosses under the "b"- element.
Explanation for -2):
This structure has no opposite-handed mate,
and therefore it is non-handed.
The structure contains left- & right-handed nodes,
like those shown in Fig's. -5(c) & -5(d) respectively.
They are interdispersed among each other in a manner
as shown schematically in Fig. -5(e).
These left- & right-handed nodes are
interdispersed among each other
to the maximal degree.
Such an interdispersement is maximally even;
each node is then abutted only by
opposite-handed nodes.
That interdispersement is also a 3D-analog of
the interdispersement among each other
