A metaphor is a figure of speech that identifies one thing as being the same as some unrelated other thing, thus strongly implying the similarities.
For base plate grouting, approximately 1.5 to 2 bags of GP2 cement (assuming each bag is 50 kg) are typically used per cubic meter, depending on the specific mix design and project requirements. This calculation may vary based on factors such as the desired strength, water-cement ratio, and any additives used in the mix. Always consult project specifications or a structural engineer for precise requirements.
RADIAC stands for Radiation Detection, Indication And Computation. A description is given of the main types of radiation monitoring instruments, usually called "radiac" instruments, which would be required by the civil defence authorities in the event of atomic warfare. The instruments discussed include the flash dosemeter, individual dosemeter, dose-rate meter and contamination meter. In each case, an account is given of the purpose of the instrument and the performance characteristics required, and some typical designs are mentioned. The paper concludes with an appendix giving the approved specifications for each instrument discussed.