Passive systems rely on heat-driven convection or heat pipes to circulate water or heating fluid in the system. Passive solar water heating systems cost less and have extremely low or no maintenance, but the efficiency of a passive system is significantly lower than that of an active system.
316L Stainless Steel. 316L Stainless Steel is commonly used for jewelry because with it will not oxidize nor turn black with only minimal maintenance. Its resistance to corrosion and staining, as well as its durability and sleek look have made stainless steel body jewelry the most popular type of material for piercing enthusiasts worldwide. Our body jewelry products are made with high quality 316L Surgical Steel which is safe for all types of body piercings or implants.
Re: Technomarine...any good. i tried a few at a local retailer and i liked the feel of the all-SS watches, the ones with the interchangable plastic bezels were cheep and bulky. But the stainless chronos were solid pieces of kit, and not too big for my wrist.WOW has a few older model SS examples at good prices.e: Technomarine...any good. Errr.... it depends on what you're looking for,.,,.,. if you're asking as a complete package type of deal (good built, high quality, dependable movement, etc).... then NOOO.. now if you're looking for a nice looking watch---a watch a celebrity would wear (b level celeb), etc..