<s>
TRI-D	B-Device
is	O
a	O
3D	O
printed	O
metal	O
rocket	O
engine	O
.	O
</s>
<s>
The	O
Tri-D	B-Device
engine	O
cost	O
US$	O
6,800	O
.	O
</s>
<s>
The	O
Tri-D	B-Device
rocket	O
engine	O
was	O
designed	O
and	O
built	O
with	O
the	O
cooperation	O
of	O
NASA	O
’s	O
Marshall	O
Space	O
Flight	O
Center	O
,	O
to	O
explore	O
the	O
feasibility	O
of	O
printed	O
rocket	O
components	O
.	O
</s>
<s>
Tri-D	B-Device
is	O
around	O
17.7cm	O
long	O
and	O
weighs	O
around	O
4.5kg	O
.	O
</s>
