What I can find is a fire suppressant system FS1000 used in a variety of industrial settings. The nearest I can find to it (with any information) is this one
https://studylib.net/doc/18458214/parts-and-service-manual--... which has a parts list and tool kit which includes crimping pliers. I can only find two other references to 'pince mèche' relating to mining. One is a patent application but unfortunately has no diagrams and the other is in a CV where the person describes studying "technique d'une pince meche permettant le changement automatique de la tige de perforation pour machine minière souterraine." -
https://viadeo.journaldunet.com/p/mohamed-garoual-1341864There is a fire resistant gasketing foam tape FS1000 -
https://www.tapesolutions.saint-gobain.com/products/norseal-... Other than that, I can only see 'pince mèche' referred to as crimping pliers but in relation to attaching hair extensions!
Sorry - it's not much help. Is there any chance that this is actually two items - 'Sangle flexible' and 'pince mèche'?