main magnetic pole
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- major
- assigned
- principal traffic route
- Lunar probe
- rise and fall
- lighting and ventilating shaft
- master link,master rod; main connecting rod,
- topgallant
- quotation
- triple treat sonar
- damping effect
- broad on the starboard quarter
- general speed
- running out system
- general delivery
- British Insurance Group
- oil window
- quality conformance inspection
- cargo lamp
- Period of Container Leasing