DE2126319A1 - Process for the production of a shaped body and shaped body produced by this process - Google Patents
Process for the production of a shaped body and shaped body produced by this processInfo
- Publication number
- DE2126319A1 DE2126319A1 DE19712126319 DE2126319A DE2126319A1 DE 2126319 A1 DE2126319 A1 DE 2126319A1 DE 19712126319 DE19712126319 DE 19712126319 DE 2126319 A DE2126319 A DE 2126319A DE 2126319 A1 DE2126319 A1 DE 2126319A1
- Authority
- DE
- Germany
- Prior art keywords
- resin
- shaped body
- layer
- body according
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/005—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B5/00—Hulls characterised by their construction of non-metallic material
- B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
- E04C2/243—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20 one at least of the material being insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Architecture (AREA)
- Manufacturing & Machinery (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Combustion & Propulsion (AREA)
- Laminated Bodies (AREA)
Description
REGENSBURG 3 · LESSINGSTRASSE 10REGENSBURG 3 LESSINGSTRASSE 10
An dasTo the
Deutsche PatentamtGerman Patent Office
Telefon 09 41/21986 Bayer. Staatsbank, Regensburg 507 Postscheckkonto: München 89369 Telegramme: Begpatent RegensburgPhone 09 41/21986 Bayer. State Bank, Regensburg 507 Postal check account: Munich 89369 Telegrams: Begpatent Regensburg
8 München 28 Munich 2
In der Antwort bitte angeben Unser ZeichenPlease state our reference in the answer
LR/P 7135LR / P 7135
Ta» 26. Mai 1971 B/We Ta »May 26, 1971 B / We
Domenico Lini, Frazione Grazie, Curtatone (Italien) und Renzo Ramaschi, Prazione Villa Garibaldi, Roncoferraro (Italien)Domenico Lini, Frazione Grazie, Curtatone (Italy) and Renzo Ramaschi, Prazione Villa Garibaldi, Roncoferraro (Italy)
Verfahren zur Herstellung eines Formkörpers und nach diesem Verfahren hergestellter Formkörper.Process for the production of a shaped body and according to this process manufactured molded body.
Die Erfindung betrifft ein Verfahren zur Herstellung eines Formkörpers beispielsweise für Bauzwecke, als Gebrauchsgegenstand, Wasserfahrzeug oder Maschinenelement sowie zur Wärme- und/oder Schallisolierung, und außerdem einen nach diesem Verfahren hergestellten Formkörper.The invention relates to a method for producing a shaped body, for example for building purposes, as a commodity, Watercraft or machine element as well as for thermal and / or sound insulation, and also one according to this method produced moldings.
Der Erfindung liegt die Aufgabe zugrunde, einen leichten, widerstandsfähigen und kostenmässig äusserst billigen Formkörper zu schaffen.The invention is based on the object of a lightweight, robust and to create moldings that are extremely cheap in terms of cost.
Das Verfahren nach der Erfindung besteht darin, daß man vollThe method according to the invention consists in that one full
109852/1244109852/1244
LR/p 7135 ' -2- 26. Mai 1971 B/WeLR / p 7135 '-2- May 26, 1971 B / We
ausgereifte, blätterlose, jedoch noch mit der Grundhaut versehene Pflanzenrohrstengel auf Maß schneidet, diese vorzugsweise mit feuerhemmendem und wasserabweisendem Lack behandelt, sie in eine Form gibt, indem man eine erste Schicht von parallel zueinander und praktisch in gegenseitiger Berührung angeordneten Rohrstengeln bildet, gegebenenfalls eine zweite Schicht von um einen bestimmten Winkel, vorzugsweise um 90 , gegenüber den Stengeln der ersten Schicht versetzten Rohrstengeln und gegebenenfalls weitere jeweils auf diese Weise zueinander versetzte Schichten aufeinander legt, die Form schließt und dann in die Form eine Mischung aus geeigneten Bestandstoffen zur Bildung eines Harzklebers und zugleich ein Druckgas zur Verschäumung des sich allmählich bildenden Harzklebers einführt, das Ganze einige Minuten lang ruhen läßt, anschließend die Form öffnet und den so gebildeten Formkörper aus der Form heraushebt.Cut mature, leafless, but still with the basic skin, plant cane stalks to size, preferably these Treated with fire retardant and water repellent varnish, put them in a mold by making a first layer of parallel to each other and practically in mutual contact arranged pipe stems, optionally a second layer of um Pipe stems offset at a certain angle, preferably by 90, with respect to the stalks of the first layer, and optionally further layers, each offset from one another in this way, are placed on top of one another, the mold closes and then into the Form a mixture of suitable ingredients to form a resin adhesive and at the same time a pressurized gas for foaming of the gradually forming resin adhesive, let it rest for a few minutes, then open the mold and lifts the molded body thus formed out of the mold.
Gemäß einer anderen Ausführungsform wird kontinuierlich vorgegangen, indem man die Rohrstengel auf ein Förderband legt, über dem ein zweites Förderband parallel zum ersten läuft. Seitlich stützen sich die beiden Förderbänder von gleicher Breite gegen senkrechte Wände ab, die das Ganze einschließen und einen Kanal mit rechteckigem oder anders geformtem Querschnitt bilden, wobei an einem Ende desselben die Mischung und der Gasstrahl kontinuierlich eingeführt werden und am anderen Ende der geformte Körper abgestreift wird. Anschließend kann dieser Körper in der gewünschten Größe und Form geschnitten werden.According to another embodiment, the procedure is continuous in that the pipe stalks are placed on a conveyor belt over which a second conveyor belt runs parallel to the first. Laterally, the two conveyor belts of the same width are supported against vertical walls that enclose the whole and form a channel with a rectangular or other shaped cross-section, at one end of which the mixture and the gas jet are continuously introduced and at the other end the shaped body is wiped off will. This body can then be cut to the desired size and shape.
Der erfindungsgemäß aufgebaute Körper besteht aus einer Bewehrung aus parallel zueinander und praktisch in gegenseitiger Berührung angeordneten PflanzenrohrStengeln, die wenigstens eine Schicht bilden und in einer verschäumten Kunstharzmasse eingebettet sind. Werden mehrere Schichten vorgesehen, so sind die RohrstengelThe body constructed according to the invention consists of a reinforcement of plant tube stems arranged parallel to one another and practically in mutual contact , which form at least one layer and are embedded in a foamed synthetic resin compound. If several layers are planned, the cane stalks are used
109852/1244109852/1244
LR/p 7135 -3- 26. Mai 1971 B/WeLR / p 7135 -3- May 26, 1971 B / We
212631$212631 $
einer jeden Schicht um einen gewissen Winkel, vorzugsweise um 90 , gegenüber den Stengeln der anliegenden Schichten versetzt.of each layer offset by a certain angle, preferably by 90, with respect to the stalks of the adjacent layers.
Vorzugsweise werden die Pflanzenstengel mit einem feuerhemmenden und wasserabweisenden Stoff getränkt, um sie vor Brand zu schützen. Als feuerhemmende Stoffe sind beispielsweise Chloroprenharz, Butadien, Harnstoff-Formaldehydharz, Aminoplaste oder andere Tränkstoffe geeignet.The plant stems are preferably impregnated with a fire-retardant and water-repellent substance in order to protect them from fire. Examples of fire-retardant substances are chloroprene resin, butadiene, urea-formaldehyde resin, aminoplasts and others Suitable for impregnating substances.
Als verschäumte Harzmasse dienen vorzugsweise Polyurethanharze, doch können zweckmäßig auch Furan- oder Epoxydharz, Harnstoff- oder Phenolharz, Polystyrol-, Silikon-, Polyvinyl-, Akryl-Nitrilharz verwendet werden.Polyurethane resins are preferably used as the foamed resin mass, but furan or epoxy resin, urea resin can also expediently be used. or phenolic resin, polystyrene, silicone, polyvinyl, acrylic nitrile resin be used.
In der Zeichnung ist die Erfindung beispielsweise dargestellt. Es zeigen:In the drawing, the invention is shown by way of example. Show it:
Figur 1 eine Perspektive Darstellung eines nach dem erfindungsgemäßen Verfahren hergestellten blockförmigen Körpers, undFigure 1 is a perspective view of one according to the invention Process manufactured block-shaped body, and
Figur 2 einen senkrechten Schnitt nach der Linie II-II von Fig.l.Figure 2 is a vertical section along the line II-II of Fig.l.
Wie aus der Zeichnung ersichtlich ist, besteht der erfindungsgemäß aufgebaute Körper aus mehreren übereinander gelagerten Schichten la, Ib ... von Pflanzenrohrstengeln. Die Stengel einer jeden Schicht sind nebeneinander und praktisch in gegenseitiger Anlage angeordnet und bilden bei der dargestellten Ausführungsform einen Winkel von 90 mit Rohrstengeln der benachbarten Schichten.As can be seen from the drawing, there is the according to the invention Body built up from several superimposed layers la, Ib ... of plant cane stalks. The stalks of one each layer are arranged next to one another and practically in mutual contact and, in the embodiment shown, form an angle of 90 with tubular stems of the neighboring ones Layers.
109852/1244109852/1244
LR/p 7135 -4- 26. Mai 1971 B/WeLR / p 7135 -4- May 26, 1971 B / We
Der kompakte Aufbau wird dadurch erreicht, daß man die Rohrschichten bei der Formung des Körpers in eine klebrige, verschäumte Harzmasse einbettet. Diese Harzmasse kann infolge der durch die Form oder die beiden Förderbänder ausgeübten Verdichtung, zwischen denen der Formkörper aufgebaut wird, sowie infolge der Wirkung des Druckgases die Körperwände ganz oder teilweise überdecken und dadurch einen zusammenhängenden Überzug 2 an diesen Wänden bilden (Fig. 1). The compact structure is achieved by the fact that the pipe layers embedded in a sticky, foamed resin mass when the body is molded. This resin composition can as a result of compression exerted by the mold or the two conveyor belts between which the molded body is built up, as well as as a result of the action of the pressurized gas completely or partially cover the body walls and thereby form a cohesive coating 2 on these walls (FIG. 1).
Für besondere Verwendungszwecke kann wenigstens die oberste Stengelschicht durch eine Platte 3 aus Schichtpresstoff oder dgl. abgedeckt (Fig. 1) und die unterste Schicht gegebenenfalls auf einer Steinsplitterschicht 4 gelagert sein (Fig. 2), wobei diese tragende Schicht auch aus anderem Zuschlagmaterial,· wie Glas- oder Asbestwolle, bestehen kann. In anderen Fällen, beispielsweise- zum Aufbauen von Körpern mit wesentlich gleichen Festigkeitsmerkmalen auf ihrer gesamten Oberfläche, können zwischen den Stengeln der waagerecht angeordneten Schichten noch senkrecht angeordnete Stenge!schichten eingesetzt werden, so daß dann die Bewehrung aus SchilfrohrStengeln in drei zueinander senkrechten Richtungen angeordnet ist.For special purposes, at least the topmost stem layer can be covered by a plate 3 made of laminated plastic or Like. Covered (Fig. 1) and the lowermost layer may be stored on a stone chip layer 4 (Fig. 2), wherein this load-bearing layer can also consist of other aggregate material, such as glass or asbestos wool. In other cases, for example- to build up bodies with substantially the same strength characteristics on their entire surface, between The stalks of the horizontally arranged layers still vertically arranged stalk layers are inserted so that then the reinforcement made of reed stalks in three to one another perpendicular directions is arranged.
Die Abmessungen der so aufgebauten Formkörper sind nicht auf die Länge der Schilfrohrstengel beschränkt, da diese sowohl vor ihrer schichtweisen Anordnung zur Bildung des Formkörpers auf ein gewünschtes Maß geschnitten werden, als auch zur Bildung von nachträglich zu schneidenden und nach Wunsch zu gestaltenden Formkörpern übereinander oder in einer Reihe angeordnet werden können.The dimensions of the shaped body constructed in this way are not limited to the length of the reed stalks, as these are both in front of their layer-by-layer arrangement to form the shaped body can be cut to a desired dimension, as well as for formation of shaped bodies to be subsequently cut and designed as desired can be arranged one above the other or in a row can.
Die erfindungsgemäß aufgebauten Formkörper können zweckmäßig und vorteilhaft für die Herstellung von vorgefertigten Bauelementen Verwendung finden und zwar jeweils allein oder in VerbindungThe shaped bodies constructed according to the invention can be expedient and advantageous for the production of prefabricated structural elements Find use, either alone or in conjunction
109852/ 1244109852/1244
LR/p 7135 -5- 26. Mai 71 B/WeLR / p 7135 -5- May 26th 71 B / We
mit Verbundplatten, mit denen die Verklebung selbsttätig erfolgt, oder auch in Verbindung mit anderen Materialien. Durch ihr leichtes Gewicht (die Blöcke weisen ein spezifisches Gewicht zwischen 6O und 150 kg/m auf), ihre Festigkeit und ihre Wirtschaftlichkeit infolge der verwendeten Ausgangsmaterialien sind diese Formkörper besonders günstig in ihrer Verwendung.with composite panels, with which the bonding takes place automatically, or in connection with other materials. By their light weight (the blocks have a specific weight between 60 and 150 kg / m), their strength and their Economic efficiency Owing to the starting materials used, these moldings are particularly advantageous to use.
Die erfindungsgemäßen Formkörper können auch als fertige Gegenstände hergestellt werden, wie zum Beispiel Wasserfahrzeuge, Wannen für den Haushalt oder Industriebetrieb, Maschinenelemente, Ausstattungsmöbel usw.The moldings according to the invention can also be used as finished articles such as watercraft, tubs for household or industrial use, machine elements, furniture etc.
Als zur Durchführung des Verfahrens geeignete Pflanzenrohrstengel können beispielsweise Schilf- oder Teichrohr (Phragmites communis), indisches Schilfrohr (canna indica), das gemeine Schilfrohr (arundo Donax L.) sowie andere Pflanzenrohrarten, wie Calamus L., insbesondere Dendrocalamus giganteus Mun., Zuckerrohr (saccharum officinarum L.) genannt werden.For example, reed or pond reeds (Phragmites communis), Indian reed (canna indica), the common reed (arundo Donax L.) and other plant reed species, such as Calamus L., in particular Dendrocalamus giganteus Mun., Sugar cane (saccharum officinarum L.).
109852/1244109852/1244
Claims (15)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6885170 | 1970-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2126319A1 true DE2126319A1 (en) | 1971-12-23 |
Family
ID=11310731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712126319 Pending DE2126319A1 (en) | 1970-05-30 | 1971-05-27 | Process for the production of a shaped body and shaped body produced by this process |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2126319A1 (en) |
FR (1) | FR2092169B1 (en) |
GB (1) | GB1302467A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0798089A1 (en) * | 1996-03-27 | 1997-10-01 | Forestry And Forest Products Research Institute | Construction material made of woody material and mortar, manufacturing method and apparatus thereof |
US5876649A (en) * | 1996-08-14 | 1999-03-02 | Ryan; Dale B. | Process of making a load-carrying structure |
US6576331B1 (en) | 1996-08-14 | 2003-06-10 | Dale Bradley Ryan | Load-carrying structures comprising bamboo fibers and polymers |
CN103192949A (en) * | 2013-04-01 | 2013-07-10 | 罗文意 | Composite bamboo yacht and manufacturing process thereof |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2563763B1 (en) * | 1984-05-04 | 1986-09-19 | Tourisme Hotellerie Sa | PARTICLE PANELS OBTAINED EXCLUSIVELY FROM ROSES AND GLUES |
FR2563764B1 (en) * | 1984-05-04 | 1988-07-29 | Tourisme Hotellerie Sa | NEW CONSTRUCTION MATERIAL MADE OF RANGE AND GLUE RODS |
MC1896A1 (en) * | 1987-09-15 | 1989-02-03 | Silvatrim Sa | PROCESS FOR OBTAINING BOX BELTS IN REINFORCED ALVEOLAR PLASTIC MATERIAL |
ES2307415B1 (en) * | 2007-03-06 | 2009-10-06 | Universidad Miguel Hernandez | PROCEDURE FOR MANUFACTURING BOARDS OF AGLOMERATES FROM COMMON ROD AND BOARDS OBTAINED ACCORDING TO THIS PROCEDURE. |
ES2329749B1 (en) * | 2008-05-27 | 2010-06-24 | Universidad Miguel Hernandez | PROCEDURE FOR THE MANUFACTURE OF COMMON CANA FIBER COVERED PANELS. |
HU4642U (en) | 2016-02-13 | 2017-01-30 | Ernoe Selmeczky | Multi wall polycarbonate composite reed plate |
-
1971
- 1971-05-27 DE DE19712126319 patent/DE2126319A1/en active Pending
- 1971-05-28 FR FR7120288A patent/FR2092169B1/fr not_active Expired
- 1971-05-28 GB GB1801971A patent/GB1302467A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0798089A1 (en) * | 1996-03-27 | 1997-10-01 | Forestry And Forest Products Research Institute | Construction material made of woody material and mortar, manufacturing method and apparatus thereof |
US5876649A (en) * | 1996-08-14 | 1999-03-02 | Ryan; Dale B. | Process of making a load-carrying structure |
US6576331B1 (en) | 1996-08-14 | 2003-06-10 | Dale Bradley Ryan | Load-carrying structures comprising bamboo fibers and polymers |
CN103192949A (en) * | 2013-04-01 | 2013-07-10 | 罗文意 | Composite bamboo yacht and manufacturing process thereof |
CN103192949B (en) * | 2013-04-01 | 2015-09-09 | 罗文意 | Composite bamboo yacht and manufacturing process thereof |
Also Published As
Publication number | Publication date |
---|---|
FR2092169B1 (en) | 1973-06-08 |
GB1302467A (en) | 1973-01-10 |
FR2092169A1 (en) | 1972-01-21 |
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