缝隙爆破
缝隙装药爆破

Seam \Seam\, n. [OE. seem, seam, AS. se['a]m; akin to D. zoom,
OHG. soum, G. saum, LG. soom, Icel. saumr, Sw. & Dan. s["o]m,
and E. sew. [root] 156. See {Sew} to fasten with thread.]
1. The fold or line formed by sewing together two pieces of
cloth or leather.

2. Hence, a line of junction; a joint; a suture, as on a
ship, a floor, or other structure; the line of union, or
joint, of two boards, planks, metal plates, etc.

Precepts should be so finely wrought together . . .
that no coarse seam may discover where they join.
--Addison.

3. (Geol. & Mining) A thin layer or stratum; a narrow vein
between two thicker strata; as, a seam of coal.

4. A line or depression left by a cut or wound; a scar; a
cicatrix.

{Seam blast}, a blast made by putting the powder into seams
or cracks of rocks.

{Seam lace}, a lace used by carriage makers to cover seams
and edges; -- called also {seaming lace}.

{Seam presser}. (Agric.)
(a) A heavy roller to press down newly plowed furrows.
(b) A tailor's sadiron for pressing seams. --Knight.

{Seam set}, a set for flattering the seams of metal sheets,
leather work, etc.