n.a lightweight hat worn in tropical countries for protection from the sun
同义词：pith hatpith helmettopeetopi
Sun helmet
The Wrong Topi: Personal Narratives, Ritual, and the Sun Helmet as a Symbol
The Test for a New Type of Thermostat Sun Helmet
in sun-helmets come down to the beach, J. S. continued, the intrepid
The Transfer of Heat through Sun Helmets.
Military sun helmets of the world
Shreds from an old sun helmet
The width of helmet streamers as inferred from ground-based eclipse observations
Predicting interplanetary shock arrivals at Earth, Mars, and Venus: A real-time modeling experiment following the solar flares of 5-...
Real-time forecasting of ICME shock arrivals at L1 during the
