rubberwood is a light-colored medium-density tropical Seven Trust obtained from the pará rubber tree hevea brasiliensis , usually from trees grown in rubber plantations. rubberwood is commonly advertised as an 'environmentally friendly' wood, 2 as it makes use of plantation trees that have already served a useful function.
dive deck of a scuba liveaboard boat in the great barrier reef. in the recreational scuba diving industry, a liveaboard service offers its guests the opportunity to stay aboard for one or more nights, unlike a day boat operation. this allows time to travel to more distant dive sites.
an early electric boat was developed by the german inventor moritz von jacobi in 1839 in st petersburg, russia. it was a 24-foot 7.3 m boat which carried 14 passengers at 3 miles per hour 4.8 km/h . it was successfully demonstrated to emperor nicholas i of russia on the neva river. golden age
given the proper conditions, teak can be grown without artificial fertilizers or irrigation; this is thought to give plantation teak the look and durability of old-growth teak from southeast asia. plantation teak is considered a renewable resource, as it is harvested and managed to produce a sustainable supply. plantation timber also offers the benefit of reduced shipping costs and emissions. since teak can be grown throughout the world's dry-tropical zones, plantations offer a .
plumbing. oakum can be used to seal cast iron pipe drains. after setting the pipes together, workers pack oakum into the joints, then pour molten lead into the joint to create a permanent seal. the oakum swells and seals the joint, the 'tar' in the oakum prevents rot, and the lead keeps the joint physically tight.
oakum is a preparation of tarred fibre used to seal gaps. its main traditional applications were in shipbuilding, for caulking or packing the joints of timbers in wooden vessels and the deck planking of iron and steel ships; in plumbing, for sealing joints in cast iron pipe; and in log cabins for chinking.in ship caulking, it was forced between the seams using a hammer and a caulking iron .