maintenance
发表于 2025-3-25 05:47:04
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不舒服
发表于 2025-3-25 09:23:06
Introduction, offered to students in the Secondary Schools. Over the years many students have found woodwork a worth-while occupation. Others who chose not to make woodworking their life work have found that the training they received was of great value to them in many ways, such as in making necessary repairs t
medieval
发表于 2025-3-25 14:29:29
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泥瓦匠
发表于 2025-3-25 17:55:28
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刺耳的声音
发表于 2025-3-25 23:19:03
Wood As a Material,could be shaped and several pieces joined together to make all manner of useful things. With the advance of civilization other materials have replaced wood for some purposes, but there has been, at the same time, a very large increase in the number and variety of new products manufactured from wood
NATAL
发表于 2025-3-26 02:11:18
Wood Shrinkage and Warpage,k or swell depends on how much moisture the wood contains: freshly sawn wood contains a great deal; lumber that has been seasoned contains little. The moisture content of the air surrounding lumber will also determine the amount of shrinkage or swelling which takes place. Wood gives up moisture and
gain631
发表于 2025-3-26 04:33:19
Bill of Material: Board Feet and Lumber Grades, because they fail to estimate the actual quantity of material required. Thus the first step is to make a list of materials required to complete the project. This list is referred to as a “Bill of Material”. It should be complete, listing each piece, its exact thickness, width and length as well as
fructose
发表于 2025-3-26 11:20:44
Squaring Stock,o make a true rectangular shape with all surfaces flat, all corners square, all opposite sides parallel and of the correct thickness, width and length. You may have performed this operation before; however, this is an important one which you should be very familiar with.
表示向前
发表于 2025-3-26 14:18:15
Brace, Bits and Drills,d, you should have no difficulty. Holes must be located accurately; they must be bored at the correct angle, and the wood should not be allowed to split when the bit comes through the back of the stock. The bits should be sharp.
engender
发表于 2025-3-26 18:23:44
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