ALX20-500-2000/120SP+LXI ALX-202-027 ALX20-200-4800/120SP+LXI ALX20-1000-600/120SP+LXI ALX2.5-200-600+LXI ALX2.5-1000-75+LXI AL-X1报警触头 ALX17.5-500-1750/120SP+LXI ALX17.5-200-4200/120SP+LXI ALX15-500-1500/120SP+LXI