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에스피이
생산 제품
Vertical drain

PBD (Plastic board drain)
VD55, VD55R, VD60, VD60R, VD75, VD75R, VD80, VD90, VD80R

C-PBD (Cylindrical PBD)
C-PBD, C-PBDR
Horizontal drain

CHD
CHD 200, CHD 300, CHDR 200, CHDR 300

Connector

HHD
HHD100, HHD200, HHD300, HHDR100, HHDR200, HHDR300
PCD

PCD (Plastic cylindrical drain)
PCD32, PCD50

SHD / SPE Horizontal drain
KSHD-200, KSHD-300, KSHD-S75, KSHD-S100
S-PBD / Biodegradable PBD
Vacuum consolidation