We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.
下载应用程序
Sound Muffling Box, providing a constant fixed sound . Its perfect for fair test experiments. Any household materials can be added to show the effect they have on sound travel. Complete with built in buzzer and switch ( requires 2 x AA batteries not supplied)
TrustPilot
2 个月前
3 周前
2天前
2 个月前