
| L max | = Max. extending length |
| L min | = Min. compression length |
| Z | = Extending length of protective sheet metal |
| ST | = Max. extending length – Min. compression length = Total working stroke |
| H | = Height of corrugation |
| W | = Width of protective curtain |
| L | = Accumulated thickness of protective metal sheet |
High speed traveling / Resist high temperature Chips / Light weight
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