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• It is therefore best to apply the Debye equation to ...

• These antifoams are best added before foaming starts.

• Such calculations are best conducted by digital computer.

• It is advisable (or advised, or wise) to have as much slope in the piping as possible.

• In some cases it is good practice first to locate the hole with a drill of smaller diameter.

• It is well to have an electric hoist for handing this operation.

• It is recommended that these values be measured at ...

• It will be well for you to become thoroughly versed in tool handling.

• Boroxines have been proposed as extinguishing agents.