working temperature limit造句

PTFE tape, bands, and fluoroether-based grease or oils, but not silicone-based, may emit toxic perfluoroisobutylene fumes as they approach and exceed their working temperature limits, which can occur when using a hotplate, mantle, or flame.
Both PTFE tape, bands, and fluoroether-based grease or oils, but not silicone-based, all emit perfluoroisobutylene fumes, as well as multiple other breakdown products, as they approach and exceed their working temperature limits ( ca . 300C ), which can occur when using a hotplate, mantle, oil bath or flame.
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