Fitted with electronic pre-determined counter to determine the number of cycles per test, acrylic plastic cover with interlock for safety.
其电子计数器可控制每次测试的测试周期，配有联锁塑料盖以保证安全性。
Glass and acrylic (plastic) covers are both used today.
现在玻璃和压克力(塑料)覆盖物都经常使用。
Glass and acrylic (plastic) covers are both used today.
现在玻璃和压克力(塑料)覆盖物都经常使用。
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